1
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He R, Liu Y, Yang X, Zheng Z, Xu Z, Takeda N, Unno M, Xu L. 13-8-13-Membered Tricyclic Ladder-Type Siloxanes Hybridized with BINOLs: Synthesis, Characterization, and Fluorescence Sensing of Fluorides. Inorg Chem 2023; 62:14991-14997. [PMID: 37677105 DOI: 10.1021/acs.inorgchem.3c01780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
Developing fluorescent chemosensors with sensitivity and high specificity for recognizing fluorides is still challenging. Herein, four innovative compounds based on 13-8-13-membered tricyclic ladder-type siloxanes hybridized with BINOLs (abbreviated as TLS-BINOLs) were prepared through the B(C6F5)3-catalyzed Piers-Rubinsztajn reaction. The well-defined ladder-type structure of the TLS-BINOLs was determined by X-ray crystallographic analysis. Additionally, the fluorescent sensing ability of the TLS-BINOLs toward anions was studied. Our finding revealed that all four ladder-type compounds (TLS-BINOLs) exhibited high specificity in recognizing fluorides through fluoride-triggered structural decomposition. The detection limits for fluorides were determined to be 0.37, 0.35, 0.39, and 0.48 μM for the respective TLS-BINOLs. The nonemissive product induced by the fluorides was also determined using single-crystal X-ray diffraction analysis.
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Affiliation(s)
- Rongrong He
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, People's Republic of China
| | - Yujia Liu
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan
| | - Xiaoyue Yang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, People's Republic of China
| | - Zhanjiang Zheng
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, People's Republic of China
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan
| | - Zheng Xu
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, People's Republic of China
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan
| | - Liwen Xu
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, People's Republic of China
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2
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Liu Y, Tokuda M, Takeda N, Ouali A, Unno M. New Janus Tricyclic Laddersiloxanes: Synthesis, Characterization, and Reactivity. Molecules 2023; 28:5699. [PMID: 37570669 PMCID: PMC10420224 DOI: 10.3390/molecules28155699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/21/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023] Open
Abstract
The synthesis of four novel syn-type tricyclic laddersiloxanes bearing eight or six alkenyl groups is presented. These compounds possess reactive alkenyl groups on both the bridged and side silicon atoms, and their structures were determined through characterization using multinuclear 1D and 2D NMR spectroscopy, mass spectrometry, and elemental analysis techniques. To investigate their reactivity, the compounds were subjected to hydrosilylation using two different silanes, and the resulting fully hydrosilylated compounds were thoroughly analyzed. Remarkably, all the synthesized laddersiloxanes displayed high thermal stability, suggesting their potential as promising precursors for the development of new hybrid materials. Additionally, preliminary findings indicate the possibility of exploiting the reactivity difference between the alkenyl groups attached to the D- and T-unit silicon atoms for the synthesis of Janus molecules. These findings highlight the potential of the reported compounds as valuable building blocks in the construction of innovative materials.
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Affiliation(s)
- Yujia Liu
- Department of Chemistry and Chemical Biology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan; (M.T.); (N.T.)
| | - Midori Tokuda
- Department of Chemistry and Chemical Biology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan; (M.T.); (N.T.)
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan; (M.T.); (N.T.)
| | - Armelle Ouali
- ICGM, Univ. Montpellier, CNRS, ENSCM, 1919 Route de Mende, 34293 Montpellier, CEDEX 05, France
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan; (M.T.); (N.T.)
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3
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Zheng Z, Yagafarov N, Xu Z, Ouali A, Takeda N, Liu Y, Unno M. BINOL and triazole-containing Janus rings and 29-8-29-membered tricyclic ladder-type hybridized siloxane: application in the fluorescence sensing of anions. Dalton Trans 2023. [PMID: 37466385 DOI: 10.1039/d3dt01320k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
Tetrachloro- and tetraazide-substituted all-cis-tetraphenylcyclotetrasiloxanes (all-cis-T4) 2 and 3 were synthesized in high yields and were fully characterized. Then the precursor 3 underwent CuAAC click reaction with monopropargyl BINOL 4 and dipropargyl BINOL 6 to give the novel BINOL and triazole-containing all-cis-T4 cyclic siloxane 5 and the 29-8-29-membered-ring ladder-type hybrid siloxane 7. The sensing ability of compounds 5 and 7 towards anions was studied as well, and it was observed that 7 could selectively recognize iodides through synergistic C-H⋯I hydrogen bonding, resulting in an impressive fluorescence quenching with a Ksv of 8.10 × 104 M-1.
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Affiliation(s)
- Zhanjiang Zheng
- College of Materials, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, China.
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan.
| | - Niyaz Yagafarov
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan.
| | - Zheng Xu
- College of Materials, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, China.
| | - Armelle Ouali
- ICGM, Univ. Montpellier, CNRS, ENSCM, 1919 route de Mende, Montpellier 34293, Cedex 5, France
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan.
| | - Yujia Liu
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan.
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan.
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4
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Zheng Z, Liu Y, Takeda N, Unno M. Synthesis and characterization of sulfide/sulfone-containing 18-8-18-membered-ring ladder-type siloxanes. Dalton Trans 2023. [PMID: 37395068 DOI: 10.1039/d3dt01227a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Innovative macrocyclic 14-membered molecule (5) and tricyclic 18-8-18-membered-ring ladder-type siloxane-based compound (7), with sulfide units inserted in the backbone were prepared through B(C6F5)3-catalyzed Piers-Rubinsztajn reaction. Further oxidation of 5 and 7 with m-CPBA enables the synthesis of the novel sulfonyl-containing cyclic and ladder-type compound (8 and 9) in high yields. Both tricyclic ladder-type products (7 and 9) show superior thermostability and their well-defined syn-type structures were determined by X-ray crystallographic analysis. The compounds 7 and 9 may become promising building blocks for various new materials.
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Affiliation(s)
- Zhanjiang Zheng
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan.
| | - Yujia Liu
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan.
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan.
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan.
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5
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Liu Y, Unno M. Development Story of Janus Siloxanes. J SYN ORG CHEM JPN 2022. [DOI: 10.5059/yukigoseikyokaishi.80.1126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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6
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Abstract
Cyclic silanol derivatives (CSDs), possessing siloxane rings consisting of T-unit silicon and oxygen atoms, are considered efficient precursors for the preparation of versatile well-defined building blocks of hybrid materials such as cyclic, cage- or ladder-type SQs. This review provides an outline of the main synthetic routes to numerous stereoregular CSDs with different sizes of siloxane rings since the first example of CSDs reported by Brown et al. in 1965. The typical reaction conditions and chemical shifts of 29Si NMR of all mentioned CSDs in this review are summarized in tables and schemes to recapitulate the state of the art. The synthesis of all-cis-cyclotetrasiloxanes (T4), the most investigated CSDs, and their functionalization by different organic reactions to access various all-cis-T4 with functional groups are methodically presented. Moreover, the potential of CSDs in multiple application fields is discussed to show the possible research directions of this family of compounds in the future.
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Affiliation(s)
- Yujia Liu
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan.
| | - Thanawat Chaiprasert
- Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phayathai Road Pathum Wan Wang Mai, Bangkok 10330, Thailand
| | - Armelle Ouali
- ICGM, Univ Montpellier, CNRS, ENSCM, 1919 route de Mende, Montpellier 34293 Cedex 5, France
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan.
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7
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Liu Y, Katano M, Yingsukkamol PK, Takeda N, Unno M, Ouali A. Tricyclic 6–8–6 laddersiloxanes derived from all-cis-tetravinylcyclotetrasiloxanolate: Synthesis, characterization and reactivity. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2021.122213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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8
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Liu Y, Koizumi K, Takeda N, Unno M, Ouali A. Synthesis of Octachloro- and Octaazido-Functionalized T 8-Cages and Application to Recyclable Palladium Catalyst. Inorg Chem 2022; 61:1495-1503. [PMID: 34995060 DOI: 10.1021/acs.inorgchem.1c03209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Unprecedented T8-cages bearing eight chloromethyldimethylsilylethyl substituents were obtained in excellent yield from the readily and commercially available octavinylsilsesquioxane. The chloro groups can be quantitatively substituted by azido ones to yield the corresponding octaazido T8 without rearrangement of the cage. The syntheses of both functionalizable POSSs are scalable (gram-scale). The azido-functionalized T8 compound constitutes a versatile building block able to undergo copper-catalyzed azide-alkyne [3 + 2] cycloaddition. As a proof of concept, it was allowed to react with 2-ethynylpyridine to give rise to a multidentate ligand bearing eight 2-pyridyl-triazole moieties (N,N-pincers). The coordination of the eight N,N-bidentate ligands to palladium(II) led to the corresponding octa-palladium complex shown to successfully promote the coupling reaction between anisole and phenylboronic acid. The low solubility of this catalytic complex in the reaction medium enabled (or facilitated or made possible) its straightforward recovery and recycling with four cycles with no loss of activity.
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Affiliation(s)
- Yujia Liu
- Gunma University Initiative for Advanced Research (GIAR)-International Open Laboratory with ICGM France, Kiryu 376-8515, Japan.,Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Kyoka Koizumi
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Masafumi Unno
- Gunma University Initiative for Advanced Research (GIAR)-International Open Laboratory with ICGM France, Kiryu 376-8515, Japan.,Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Armelle Ouali
- Gunma University Initiative for Advanced Research (GIAR)-International Open Laboratory with ICGM France, Kiryu 376-8515, Japan.,ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier 34296, France
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9
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Egawa Y, Kobuna C, Takeda N, Unno M. Synthesis of Janus cube containing Si–H moieties. Mendeleev Communications 2022. [DOI: 10.1016/j.mencom.2022.01.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Kondo SI, Okada N, Abe S, Tanaka R, Yamamura M, Unno M. Anion recognition by silanetriol in acetonitrile. Org Biomol Chem 2022; 20:8925-8931. [DOI: 10.1039/d2ob01596j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Anion recognition ability and organocatalytic activity of a silanetriol are firstly presented by comparing with those of a series of silanol derivatives.
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Affiliation(s)
- Shin-ichi Kondo
- Department of Chemistry, Faculty of Science, Yamagata University, Yamagata 990-8560, Japan
| | - Natsumi Okada
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Shiori Abe
- Department of Chemistry, Faculty of Science, Yamagata University, Yamagata 990-8560, Japan
| | - Ryoji Tanaka
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
- Sagami Chemical Research Institute, Hayakawa 2743-1, Ayase, Kanagawa 252-1193, Japan
| | - Masaki Yamamura
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
- Faculty of Engineering, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
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11
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Wang Q, Unno M, Liu H. Silsesquioxane-Based Triphenylamine-Linked Fluorescent Porous Polymer for Dyes Adsorption and Nitro-Aromatics Detection. Materials (Basel) 2021; 14:ma14143851. [PMID: 34300768 PMCID: PMC8306194 DOI: 10.3390/ma14143851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 06/23/2021] [Accepted: 07/06/2021] [Indexed: 11/16/2022]
Abstract
In order to enrich hybrid materials, a novel fluorescent silsesquioxane-based polymer (denoted as PCS-OTS) was synthesized by Friedel-Crafts reaction starting from octavinylsilsesquioxane (OVS) with triphenylamine-functionalized silsesquioxane monomer (denoted as OTS) with AlCl3 as catalyst. PCS-OTS possessed a high surface area of 816 m2/g and a unique bimodal pore structure. The triphenylamine unit endowed PCS-OTS with excellent luminescence, which made it act as a sensitive chemical sensor and detect p-nitrophenol with high sensitivity (KSV = 81,230 M-1). Moreover, PCS-OTS can significantly remove dyes, and the respective adsorption capacity for Rhodamine B (RB), Congo red (CR) and Methyl Orange (MO) is 1935, 1420 and 155 mg/g. Additionally, it could simultaneously remove multiple dyes from water by simple filtration and be easily regenerated. This hybrid porous polymer can be a good choice for water treatment.
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Affiliation(s)
- Qingzheng Wang
- Key Laboratory of Special Functional Aggregated Materials, School of Chemistry and Chemical Engineering, Ministry of Education Shandong University, 27 Shanda Nanlu, Jinan 250100, China;
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
- Correspondence: (M.U.); (H.L.)
| | - Hongzhi Liu
- Key Laboratory of Special Functional Aggregated Materials, School of Chemistry and Chemical Engineering, Ministry of Education Shandong University, 27 Shanda Nanlu, Jinan 250100, China;
- Key Laboratory of Organosilicon and Materials Technology of the Ministry of Education, Hangzhou Normal University, Hangzhou 311121, China
- Correspondence: (M.U.); (H.L.)
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12
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Guan J, Sun Z, Ansari R, Liu Y, Endo A, Unno M, Ouali A, Mahbub S, Furgal JC, Yodsin N, Jungsuttiwong S, Hashemi D, Kieffer J, Laine RM. Conjugated Copolymers That Shouldn't Be. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jun Guan
- Department of Materials Science and Engineering University of Michigan Ann Arbor MI 48109-2136 USA
| | - Zejun Sun
- Department of Chemistry National University of Singapore Singapore 117549 Singapore
| | - Ramin Ansari
- Department of Chemical Engineering University of Michigan Ann Arbor MI 48109-2136 USA
| | - Yujia Liu
- Department of Chemistry and Chemical Biology Gunma University Kiryu 376-8515 Japan
| | - Aimi Endo
- Department of Chemistry and Chemical Biology Gunma University Kiryu 376-8515 Japan
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology Gunma University Kiryu 376-8515 Japan
| | - Armelle Ouali
- ICGM Univ Montpellier, CNRS, ENSCM Montpellier 34296 France
| | - Shahrea Mahbub
- Department of Chemistry and Center for Photochemical Science Bowling Green State University Bowling Green OH 43403 USA
| | - Joseph C. Furgal
- Department of Chemistry and Center for Photochemical Science Bowling Green State University Bowling Green OH 43403 USA
| | - Nuttapon Yodsin
- Center for Organic Electronic and Alternative Energy, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science Ubon Ratchathani University Ubon Ratchathani 34190 Thailand
| | - Siriporn Jungsuttiwong
- Center for Organic Electronic and Alternative Energy, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science Ubon Ratchathani University Ubon Ratchathani 34190 Thailand
| | - Daniel Hashemi
- Department of Materials Science and Engineering University of Michigan Ann Arbor MI 48109-2136 USA
| | - John Kieffer
- Department of Materials Science and Engineering University of Michigan Ann Arbor MI 48109-2136 USA
| | - Richard M. Laine
- Department of Materials Science and Engineering University of Michigan Ann Arbor MI 48109-2136 USA
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13
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Chaiprasert T, Liu Y, Takeda N, Unno M. Vinyl-Functionalized Janus Ring Siloxane: Potential Precursors to Hybrid Functional Materials. Materials (Basel) 2021; 14:ma14082014. [PMID: 33923699 PMCID: PMC8073502 DOI: 10.3390/ma14082014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 04/09/2021] [Accepted: 04/14/2021] [Indexed: 11/17/2022]
Abstract
A vinyl-functionalized all-cis-tetrasiloxycyclotetrasiloxane [ViSi(OSiMe2H)O]4 (Vi = vinyl group) Janus precursor was prepared from potassium cyclotetrasiloxane silanolate. The Janus precursor was selectively modified at its dimethylhydrosilyl groups [–SiMe2H] via the Piers–Rubinsztajn reaction to obtain a family of new tetravinyl-substituted Janus rings [ViSi(OR’)O]4 containing various functional groups in moderate yields. Remarkably, the tetravinyl groups on the structure remained intact after modification by the Piers–Rubinsztajn reaction. Since these synthesized compounds possess multiple functional groups (up to eight per molecule), they are potential precursors for advanced hybrid organic-inorganic functional materials.
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14
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Guan J, Sun Z, Ansari R, Liu Y, Endo A, Unno M, Ouali A, Mahbub S, Furgal JC, Yodsin N, Jungsuttiwong S, Hashemi D, Kieffer J, Laine RM. Conjugated Copolymers That Shouldn't Be. Angew Chem Int Ed Engl 2021; 60:11115-11119. [PMID: 33631031 DOI: 10.1002/anie.202014932] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Indexed: 01/06/2023]
Abstract
Multiple studies have explored using cage silsesquioxanes (SQs) as backbone elements in hybrid polymers motivated by their well-defined structures and physical and mechanical properties. As part of this general exploration, we report unexpected photophysical properties of copolymers derived from divinyl double decker (DD) SQs, [vinyl(Me)Si(O0.5 )2 ][PhSiO1.5 ]8 [(O0.5 )2 Si(Me)vinyl] (vinylDDvinyl). These copolymers exhibit strong emission red-shifts relative to model compounds, implying unconventional conjugation, despite vinyl(Me)Si(O-)2 siloxane bridges. In an effort to identify minimum SQ structures that do/do not offer extended conjugation, we explored Heck catalyzed co-polymerization of vinyl-ladder(LL)-vinyl compounds, vinyl(Me/Ph)Si(O0.5 )2 [PhSiO1.5 ]4 (O0.5 )2 Si(Me/Ph)vinyl, with Br-Ar-Br. Most surprising, the resulting oligomers show 30-60 nm emission red-shifts beyond those seen with vinylDDvinyl analogs despite lacking a true cage. Further evidence for unconventional conjugation includes apparent integer charge transfer (ICT) between LL-co-thiophene, bithiophene, and thienothiophene with 10 mol % F4 TCNQ, suggesting potential as p-type doped organic/inorganic semiconductors.
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Affiliation(s)
- Jun Guan
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109-2136, USA
| | - Zejun Sun
- Department of Chemistry, National University of Singapore, Singapore, 117549, Singapore
| | - Ramin Ansari
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109-2136, USA
| | - Yujia Liu
- Department of Chemistry and Chemical Biology, Gunma University, Kiryu, 376-8515, Japan
| | - Aimi Endo
- Department of Chemistry and Chemical Biology, Gunma University, Kiryu, 376-8515, Japan
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Gunma University, Kiryu, 376-8515, Japan
| | - Armelle Ouali
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, 34296, France
| | - Shahrea Mahbub
- Department of Chemistry and Center for Photochemical Science, Bowling Green State University, Bowling Green, OH 43403, USA
| | - Joseph C Furgal
- Department of Chemistry and Center for Photochemical Science, Bowling Green State University, Bowling Green, OH 43403, USA
| | - Nuttapon Yodsin
- Center for Organic Electronic and Alternative Energy, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani, 34190, Thailand
| | - Siriporn Jungsuttiwong
- Center for Organic Electronic and Alternative Energy, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani, 34190, Thailand
| | - Daniel Hashemi
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109-2136, USA
| | - John Kieffer
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109-2136, USA
| | - Richard M Laine
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109-2136, USA
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15
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Suto H, Kamei K, Kato H, Misawa T, Unno M, Nitta H, Satoi S, Kawabata Y, Ohtsuka M, Rikiyama T, Sudo T, Matsumoto I, Hirao T, Okano K, Suzuki Y, Sata N, Isaji S, Sugiyama M, Takeyama Y. Diabetic control and nutritional status up to 1 year after total pancreatectomy: a nationwide multicentre prospective study. Br J Surg 2021; 108:e237-e238. [PMID: 33821972 DOI: 10.1093/bjs/znab097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 01/20/2021] [Accepted: 02/18/2021] [Indexed: 01/09/2023]
Affiliation(s)
- H Suto
- Department of Gastroenterological Surgery, Kagawa University, Kagawa, Japan
| | - K Kamei
- Department of Surgery, Kindai University, Osaka, Japan
| | - H Kato
- Department of Hepatobiliary Pancreatic and Transplant Surgery, Mie University Graduate School of Medicine, Mie, Japan
| | - T Misawa
- Department of Surgery, The Jikei University Kashiwa Hospital, Chiba, Japan
| | - M Unno
- Department of Surgery, Tohoku University, Miyagi, Japan
| | - H Nitta
- Department of Surgery, Iwate Medical University, Iwate, Japan
| | - S Satoi
- Department of Surgery, Kansai Medical University, Osaka, Japan
| | - Y Kawabata
- Department of Digestive and General Surgery, Faculty of Medicine, Shimane University, Shimane, Japan
| | - M Ohtsuka
- Department of General Surgery, Chiba University, Chiba, Japan
| | - T Rikiyama
- Department of Surgery, Saitama Medical Centre, Jichi Medical University, Saitama, Japan
| | - T Sudo
- Department of Surgery, Kure Medical Centre and Chugoku Cancer Centre, Hiroshima, Japan
| | - I Matsumoto
- Department of Surgery, Kindai University, Osaka, Japan
| | - T Hirao
- Department of Public Health, Kagawa University, Kagawa, Japan
| | - K Okano
- Department of Gastroenterological Surgery, Kagawa University, Kagawa, Japan
| | - Y Suzuki
- Department of Gastroenterological Surgery, Kagawa University, Kagawa, Japan
| | - N Sata
- Department of Surgery, Jichi Medical University, Tochigi, Japan
| | - S Isaji
- Director of Mie University Hospital, Mie, Japan
| | - M Sugiyama
- Director of Tokyo Rosai Hospital, Tokyo, Japan
| | - Y Takeyama
- Department of Surgery, Kindai University, Osaka, Japan
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16
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Liu Y, Kigure M, Okawa R, Takeda N, Unno M, Ouali A. Synthesis and characterization of tetrathiol-substituted double-decker or ladder silsesquioxane nano-cores. Dalton Trans 2021; 50:3473-3478. [PMID: 33660737 DOI: 10.1039/d1dt00042j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Tetra(3-mercaptopropyl)-silsesquioxanes with double-decker (DDSQ) or ladder nano-cores were easily prepared from the corresponding tetraallyl derivatives through fast and convenient thiol-ene reactions. An additional tetrathiol-DDSQ with more flexible arms was also synthesized in high yield from the corresponding tetrachloro-DDSQ derivative. The three novel tetrathiol silsesquioxanes described represent versatile building blocks for the preparation of hybrid organic-inorganic materials.
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Affiliation(s)
- Yujia Liu
- Gunma University Initiative for Advanced Research (GIAR)-International Open Laboratory with ICGM, France.
| | - Mana Kigure
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology. Gunma University, Kiryu 376-8515, Japan
| | - Riho Okawa
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology. Gunma University, Kiryu 376-8515, Japan
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology. Gunma University, Kiryu 376-8515, Japan
| | - Masafumi Unno
- Gunma University Initiative for Advanced Research (GIAR)-International Open Laboratory with ICGM, France. and Department of Chemistry and Chemical Biology, Graduate School of Science and Technology. Gunma University, Kiryu 376-8515, Japan
| | - Armelle Ouali
- Gunma University Initiative for Advanced Research (GIAR)-International Open Laboratory with ICGM, France. and ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier 34296, France
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17
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Chaiprasert T, Liu Y, Intaraprecha P, Kunthom R, Takeda N, Unno M. Synthesis of Tricyclic Laddersiloxane with Various Ring Sizes (Bat Siloxane). Macromol Rapid Commun 2021. [DOI: 10.1002/marc.202170013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Laird M, Herrmann N, Ramsahye N, Totée C, Carcel C, Unno M, Bartlett JR, Wong Chi Man M. Large Polyhedral Oligomeric Silsesquioxane Cages: The Isolation of Functionalized POSS with an Unprecedented Si
18
O
27
Core. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202010458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | - Cédric Totée
- ICGM Univ. Montpellier CNRS ENSCM Montpellier France
| | - Carole Carcel
- ICGM Univ. Montpellier CNRS ENSCM Montpellier France
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology Graduate School of Science and Technology Gunma University Kiryu 376-8515 Gunma Japan
| | - John R. Bartlett
- Western Sydney University Locked Bag 1797 Penrith NSW 2751 Australia
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19
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Laird M, Herrmann N, Ramsahye N, Totée C, Carcel C, Unno M, Bartlett JR, Wong Chi Man M. Large Polyhedral Oligomeric Silsesquioxane Cages: The Isolation of Functionalized POSS with an Unprecedented Si 18 O 27 Core. Angew Chem Int Ed Engl 2021; 60:3022-3027. [PMID: 33043577 DOI: 10.1002/anie.202010458] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Indexed: 12/19/2022]
Abstract
The synthesis of organo-functionalized polyhedral oligomeric silsesquioxanes (POSS, (R-SiO1.5 )n , Tn ) is an area of significant activity. To date, T14 is the largest such cage synthesized and isolated as a single isomer. Herein, we report an unprecedented, single-isomer styryl-functionalized T18 POSS. Unambiguously identified among nine possible isomers by multinuclear solution NMR (1 H, 13 C, and 29 Si), MALDI-MS, FTIR, and computational studies, this is the largest single-isomer functionalized Tn compound isolated to date. A ring-strain model was developed to correlate the 29 Si resonances with the number of 6-, 5-, and/or 4-Si-atom rings that each non-equivalent Si atom is part of. The model successfully predicts the speciation of non-equivalent Si atoms in other families of Tn compounds, demonstrating its general applicability for assigning 29 Si resonances to Si atoms in cage silsesquioxanes and providing a useful tool for predicting Si-atom environments.
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Affiliation(s)
- Mathilde Laird
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | | | | | - Cédric Totée
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | - Carole Carcel
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Gunma, Japan
| | - John R Bartlett
- Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
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20
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Laird M, Totée C, Gaveau P, Silly G, Van der Lee A, Carcel C, Unno M, Bartlett JR, Wong Chi Man M. Functionalised polyhedral oligomeric silsesquioxane with encapsulated fluoride - first observation of fluxional SiF interactions in POSS. Dalton Trans 2021; 50:81-89. [PMID: 33216075 DOI: 10.1039/d0dt03057k] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of a styryl functionalised POSS incorporating an encapsulated fluoride ion within a (SiO1.5)8 cage (T8-F) is reported. It was characterised by single crystal XRD, MALDI-MS, FTIR, solution (29Si, 19F, 13C, 1H) and solid state (29Si, 19F) NMR. In the absence of 1H decoupling, the 29Si solution NMR spectrum exhibited a triplet of doublets. In contrast, 1H, 19F and 1H/19F double-decoupling resulted in two, three and one signal, respectively, being consistent with a single Si site whose 29Si NMR signal is modulated by both the proximal aromatic-ring protons and fluoride. The associated SiF coupling constant (2.5 Hz) is substantially lower than expected for a covalent Si-F bond and arises from a fluxional SiF covalent effect in which the F- interacts equivalently with all eight Si atoms. Additional variable temperature NMR studies demonstrated a threshold at -5 °C below which no SiF interactions are observed, and above which an increasing SiF covalent character occurs.
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Affiliation(s)
- Mathilde Laird
- ICGM Univ. Montpellier, CNRS, ENSCM, Montpellier, France.
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21
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Laird M, Gaveau P, Trens P, Carcel C, Unno M, Bartlett JR, Wong Chi Man M. Post-synthesis modification of functionalised polyhedral oligomeric silsesquioxanes with encapsulated fluoride – enhancing reactivity of T 8-F POSS for materials synthesis. NEW J CHEM 2021. [DOI: 10.1039/d0nj06008a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The first successful approach for modifying poorly reactive POSS containing F− (T8-F) and incorporating intact T8-F within a nanohybrid material is described.
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Affiliation(s)
| | | | | | | | - Masafumi Unno
- Department of Chemistry and Chemical Biology
- Graduate School of Science and Technology
- Gunma University
- Kiryu 376-8515
- Japan
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22
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Chaiprasert T, Liu Y, Intaraprecha PK, Kunthom R, Takeda N, Unno M. Synthesis of Tricyclic Laddersiloxane with Various Ring Sizes (Bat Siloxane). Macromol Rapid Commun 2020; 42:e2000608. [PMID: 33326166 DOI: 10.1002/marc.202000608] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/17/2020] [Indexed: 11/10/2022]
Abstract
A new synthetic method for tricyclic laddersiloxanes, ladder-type silsesquioxanes with defined structures, is developed based on intramolecular cyclization of hydrosilyl-functionalized cyclic siloxanes. This method enables the construction of unprecedented laddersiloxanes with various ring sizes. Herein, the preparation of tricyclic laddersiloxanes containing 6-8-6-, 8-8-8-, or 12-8-12-membered-ring systems is reported. These products can be considered as bat-shape siloxanes, owing to their rigid inorganic siloxane body with flexible oligosiloxane "wings" as side rings. The synthesized compounds are potential building blocks for well-defined nanomaterials, porous materials, and host molecules.
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Affiliation(s)
- Thanawat Chaiprasert
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Japan
| | - Yujia Liu
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Japan
| | - Pa-Kwan Intaraprecha
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Japan
| | - Rungthip Kunthom
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Japan
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Japan
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Japan
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23
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Chaiprasert T, Liu Y, Takeda N, Unno M. Janus ring siloxane: a versatile precursor of the extended Janus ring and tricyclic laddersiloxanes. Dalton Trans 2020; 49:13533-13537. [PMID: 32996968 DOI: 10.1039/d0dt03045g] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
All-cis-tetrasiloxycyclotetrasiloxanes (Janus ring siloxanes) were facilely prepared from all-cis-cyclotetrasiloxanetetraol or sodium cyclotetrasiloxane silanolates. Moreover, we demonstrated the synthesis of extended Janus rings, [RSi(OR')O]4, containing various functional groups, via the Piers-Rubinsztajn reaction using a Janus ring siloxane as a precursor. Remarkably, we discovered the formation of an unexpected all-cis tricyclic laddersiloxane as a by-product. These synthesized compounds can be potential monomers of well-defined cage silsesquioxanes, Janus-type nanomaterials, and porous materials.
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Affiliation(s)
- Thanawat Chaiprasert
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan.
| | - Yujia Liu
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan.
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan.
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan.
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24
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Abstract
A convenient and scalable (gram-scale) route to unprecedented T8D2-double-decker siloxanes (DDSQs) bearing four chloro (3b) or four azido (5b) groups is reported. Both compounds were characterized and proved to undergo successful nucleophilic substitution for 3b (with iodide or azide) and copper-catalyzed azide-alkyne [3 + 2] cycloaddition for 5b. All of these transformations occurred under mild conditions, and the corresponding DDSQs were prepared in very high yields. Beyond the enhanced multivalency as compared to the previously described disubstituted D2T8 structures, the reported tetrafunctional DDSQs are formed as a single isomer and readily isolated in very high yields. Moreover, the tetra-azido DDSQ 5b constitutes a multipurpose nanobuilding block for the further preparation of new inorganic-organic hybrid materials where the covalent incorporation of a DDSQ moiety brings valuable properties.
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Affiliation(s)
- Yujia Liu
- Gunma University Initiative for Advanced Research (GIAR)-International Open Laboratory with Institute Charles Gerhardt, Gunma University, Kiryu 376-8515, Japan.,Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Mana Kigure
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Kyoka Koizumi
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Masafumi Unno
- Gunma University Initiative for Advanced Research (GIAR)-International Open Laboratory with Institute Charles Gerhardt, Gunma University, Kiryu 376-8515, Japan.,Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Armelle Ouali
- Gunma University Initiative for Advanced Research (GIAR)-International Open Laboratory with Institute Charles Gerhardt, Gunma University, Kiryu 376-8515, Japan.,Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-UM-ENSCM, 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 05, France
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25
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Laird M, Van der Lee A, Dumitrescu DG, Carcel C, Ouali A, Bartlett JR, Unno M, Wong Chi Man M. Styryl-Functionalized Cage Silsesquioxanes as Nanoblocks for 3-D Assembly. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00119] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mathilde Laird
- ICGM, Université de Montpellier, CNRS, ENSCM, 34095 Montpellier, France
| | - Arie Van der Lee
- Institut Européen des Membranes, Université de Montpellier, UMR 5632 CNRS ENSCM, 34095 Montpellier, France
| | - Dan G. Dumitrescu
- XRD2 Beamline, Elettra − Sincrotrone Trieste S.C.p.A., Strada Statale 14-km 163,5 in AREA Science Park, 34149 Basovizza, Trieste, Italy
| | - Carole Carcel
- ICGM, Université de Montpellier, CNRS, ENSCM, 34095 Montpellier, France
| | - Armelle Ouali
- ICGM, Université de Montpellier, CNRS, ENSCM, 34095 Montpellier, France
| | - John R. Bartlett
- Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Gunma, Japan
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26
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Hashimoto D, Mizuma M, Kumamaru H, Miyata H, Chikamoto A, Igarashi H, Itoi T, Egawa S, Kodama Y, Satoi S, Hamada S, Mizumoto K, Yamaue H, Yamamoto M, Kakeji Y, Seto Y, Baba H, Unno M, Shimosegawa T, Okazaki K. Risk model for severe postoperative complications after total pancreatectomy based on a nationwide clinical database. Br J Surg 2020; 107:734-742. [PMID: 32003458 DOI: 10.1002/bjs.11437] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 07/18/2019] [Accepted: 10/28/2019] [Indexed: 01/09/2023]
Abstract
BACKGROUND Total pancreatectomy is required to completely clear tumours that are locally advanced or located in the centre of the pancreas. However, reports describing clinical outcomes after total pancreatectomy are rare. The aim of this retrospective observational study was to assess clinical outcomes following total pancreatectomy using a nationwide registry and to create a risk model for severe postoperative complications. METHODS Patients who underwent total pancreatectomy from 2013 to 2017, and who were recorded in the Japan Society of Gastroenterological Surgery and Japanese Society of Hepato-Biliary-Pancreatic Surgery database, were included. Severe complications at 30 days were defined as those with a Clavien-Dindo grade III needing reoperation, or grade IV-V. Occurrence of severe complications was modelled using data from patients treated from 2013 to 2016, and the accuracy of the model tested among patients from 2017 using c-statistics and a calibration plot. RESULTS A total of 2167 patients undergoing total pancreatectomy were included. Postoperative 30-day and in-hospital mortality rates were 1·0 per cent (22 of 2167 patients) and 2·7 per cent (58 of 167) respectively, and severe complications developed in 6·0 per cent (131 of 2167). Factors showing a strong positive association with outcome in this risk model were the ASA performance status grade and combined arterial resection. In the test cohort, the c-statistic of the model was 0·70 (95 per cent c.i. 0·59 to 0·81). CONCLUSION The risk model may be used to predict severe complications after total pancreatectomy.
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Affiliation(s)
- D Hashimoto
- Department of Gastroenterological Surgery, Kumamoto University, Kumamoto, Japan.,Department of Gastroenterological Surgery, Omuta Tenryo Hospital, Fukuoka, Japan
| | - M Mizuma
- Department of Surgery, Tohoku University, Miyagi, Japan
| | - H Kumamaru
- Department of Healthcare Quality Assessment, University of Tokyo, Tokyo, Japan
| | - H Miyata
- Department of Healthcare Quality Assessment, University of Tokyo, Tokyo, Japan.,Department of Health Policy and Management, Keio University, Tokyo, Japan
| | - A Chikamoto
- Department of Gastroenterological Surgery, Kumamoto University, Kumamoto, Japan
| | - H Igarashi
- Department of Medicine and Bioregulatory Science, Kyushu University, Fukuoka, Japan
| | - T Itoi
- Department of Gastroenterology, Tokyo Medical University, Tokyo, Japan
| | - S Egawa
- Division of International Cooperation for Disaster Medicine, Tohoku University, Miyagi, Japan
| | - Y Kodama
- Division of Gastroenterology, Department of Internal Medicine, Kobe University, Kobe, Japan
| | - S Satoi
- Department of Surgery, Kansai Medical University, Osaka, Japan
| | - S Hamada
- Division of Gastroenterology, Tohoku University, Miyagi, Japan
| | - K Mizumoto
- Cancer Centre, Kyushu University Hospital, Fukuoka, Japan
| | - H Yamaue
- Second Department of Surgery, Wakayama Medical University, Wakayama, Japan
| | - M Yamamoto
- Department of Surgery, Institute of Gastroenterology, Tokyo Women's Medical University, Tokyo, Japan
| | - Y Kakeji
- Division of Gastrointestinal Surgery, Department of Surgery, Kobe University, Kobe, Japan
| | - Y Seto
- Department of Gastrointestinal Surgery, University of Tokyo, Tokyo, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Kumamoto University, Kumamoto, Japan
| | - M Unno
- Department of Surgery, Tohoku University, Miyagi, Japan
| | - T Shimosegawa
- Department of Gastroenterology, South Miyagi Medical Centre, Miyagi, Japan
| | - K Okazaki
- Department of Gastroenterology and Hepatology, Kansai Medical University, Osaka, Japan
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27
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Kunthom R, Adachi T, Liu Y, Takeda N, Unno M, Tanaka R. Synthesis of a "Butterfly Cage" Based on a Double-Decker Silsesquioxane. Chem Asian J 2019; 14:4179-4182. [PMID: 31691478 DOI: 10.1002/asia.201901361] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 11/05/2019] [Indexed: 12/16/2022]
Abstract
Novel polyhedral structures were prepared with a butterfly-shape composed of oligosiloxane wings and a double-decker silsesquioxane (DDSQ) body. The compounds were synthesized in two steps from commercially available alkoxysilanes, and their structures were confirmed using spectroscopic methods and X-ray crystallography. Not like other phenyl-substituted cage silsesquioxanes, these butterfly cages show very good solubility in common organic solvents. The crystal structures clearly showed their unique features: a larger space with longer siloxane chains and a very flexible framework. Moreover, these compounds are thermally stable with a Td5 (5 % weight loss temperature) over 320 °C.
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Affiliation(s)
- Rungthip Kunthom
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Gunma, Japan
| | - Takuto Adachi
- Inorganic Materials Chemistry Group, Sagami Chemical Research Institute, Ayase, 252-1193, Kanagawa, Japan
| | - Yujia Liu
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Gunma, Japan
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Gunma, Japan
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Gunma, Japan
| | - Ryoji Tanaka
- Inorganic Materials Chemistry Group, Sagami Chemical Research Institute, Ayase, 252-1193, Kanagawa, Japan
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28
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Prigyai N, Chanmungkalakul S, Ervithayasuporn V, Yodsin N, Jungsuttiwong S, Takeda N, Unno M, Boonmak J, Kiatkamjornwong S. Lithium-Templated Formation of Polyhedral Oligomeric Silsesquioxanes (POSS). Inorg Chem 2019; 58:15110-15117. [PMID: 31663724 DOI: 10.1021/acs.inorgchem.9b01836] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A coordination complex, lithium hepta(i-butyl)silsesquioxane trisilanolate (1; Li-T7), a stable intermediate in silsesquioxane (SQ) syntheses, was successfully isolated in 65% yield and found to be highly soluble in nonpolar solvents such as hexane. The structure of Li-T7 was confirmed by NMR, IR spectroscopy, matrix-assisted laser desorption ionization time-of-flight mass spectrometry, electrospray ionization mass spectrometry, and computational simulation, providing detailed elucidation of the intermolecular self-association of the SQ cage with a box-shaped Li6O6 polyhedron through strong coordination bonds. After acid treatment, Li-T7 undergoes lithium-proton cationic exchange, yielding hepta(i-butyl)silsesquioxane trisilanol (2; H-T7) quantitatively. The high yield of H-T7 seems to be influenced by Li-O bonding in the Li-T7 complex that affects the selective formation of hepta(i-butyl)silsesquioxane trisilanolate and the bulky i-butyl groups which may prevent decomposition or SQ cage-rearrangement even at reflux under alkaline conditions. Single-crystal X-ray crystallography confirms the presence of the dumbbell-shaped SQ partial cages through strong intermolecular hydrogen bonds. Interestingly, lowering the polarity of the reaction solution by adding dichloromethane results in formation of the cubic octa(i-butyl)silsesquioxane (3; T8) cage in a good yield (47%), which is isolated by crystallization from the reaction solution.
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Affiliation(s)
- Nicha Prigyai
- Department of Chemistry, Center of Excellence for Innovation in Chemistry, and Center for Inorganic and Materials Chemistry, Faculty of Science , Mahidol University , Rama VI Road , Ratchathewi, Bangkok 10400 , Thailand
| | - Supphachok Chanmungkalakul
- Department of Chemistry, Center of Excellence for Innovation in Chemistry, and Center for Inorganic and Materials Chemistry, Faculty of Science , Mahidol University , Rama VI Road , Ratchathewi, Bangkok 10400 , Thailand
| | - Vuthichai Ervithayasuporn
- Department of Chemistry, Center of Excellence for Innovation in Chemistry, and Center for Inorganic and Materials Chemistry, Faculty of Science , Mahidol University , Rama VI Road , Ratchathewi, Bangkok 10400 , Thailand
| | - Nuttapon Yodsin
- Center for Organic Electronic and Alternative Energy, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science , Ubon Ratchathani University , Ubon Ratchathani 34190 , Thailand
| | - Siriporn Jungsuttiwong
- Center for Organic Electronic and Alternative Energy, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science , Ubon Ratchathani University , Ubon Ratchathani 34190 , Thailand
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology , Gunma University , Kiryu , Gunma 376-8515 , Japan
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology , Gunma University , Kiryu , Gunma 376-8515 , Japan
| | - Jaursup Boonmak
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science , Khon Kaen University , Khon Kaen 40002 , Thailand
| | - Suda Kiatkamjornwong
- Office of Research Affairs , Chulalongkorn University , 254 Phayathai Road , Wangmai, Phatumwan, Bangkok 10330 , Thailand.,FRS(T), Division of Science , the Royal Society of Thailand , Sanam Suepa , Dusit, Bangkok 10300 , Thailand
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Affiliation(s)
- Yujia Liu
- Gunma University Initiative for Advanced Research (GIAR)—International Open Laboratory with Institute Charles Gerhardt Montpellier (UMR5253 CNRS-UM-ENSCM), Gunma University, Kiryu 376-8515, Japan
| | - Kazuki Onodera
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Armelle Ouali
- Gunma University Initiative for Advanced Research (GIAR)—International Open Laboratory with Institute Charles Gerhardt Montpellier (UMR5253 CNRS-UM-ENSCM), Gunma University, Kiryu 376-8515, Japan
- Institut Charles Gerhardt Montpellier, UMR 5253, CNRS-UM-ENSCM, 8 rue de l’Ecole Normale, 34296 Montpellier, Cedex 05, France
| | - Masafumi Unno
- Gunma University Initiative for Advanced Research (GIAR)—International Open Laboratory with Institute Charles Gerhardt Montpellier (UMR5253 CNRS-UM-ENSCM), Gunma University, Kiryu 376-8515, Japan
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
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Yamamura A, Matsuo J, Lim Yi Hui M, Liana Heng D, Kofu K, Md Z, Douchi D, Yeoh K, Kamei T, Naitoh T, Osato M, Unno M, Ito Y. Chief cell in stomach have stem cell activity and potential to develop gastric cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz422.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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31
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Watanabe K, Kohyama A, Suzuki H, Kajiwara T, Karasawa H, Ohnuma S, Musha H, Kamei T, Naitoh T, Unno M. Clinical features of anorectal cancer in patients with Crohn’s disease: Japanese single center study. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz421.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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32
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Miura T, Aoki T, Ohtsuka H, Aoki S, Hata T, Iseki M, Takadate T, Ariake K, Kawaguchi K, Masuda K, Ishida M, Mizuma M, Hayashi H, Nakagawa K, Morikawa T, Motoi F, Sasano H, Naitoh T, Kamei T, Unno M. Preoperative neutrophil‐to‐lymphocyte ratio (NLR) predicts recurrence after surgery in patient with pancreatic neuroendocrine neoplasm (PanNEN). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz422.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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33
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Takeda N, Oma R, Kogure Y, Sakakibara F, Tanaka Y, Unno M. Synthesis and properties of dimethylpalladium complex with new PS3-type tripodal tetradentate ligand. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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34
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Sato N, Motoi F, Iseki M, Kawaguchi K, Katayose Y, Sato F, Unno M. Chronological evaluation of health-related quality of life and physical symptoms in postoperative pancreatic cancer patients up to 12 months. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz276.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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35
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Affiliation(s)
| | | | - Armelle Ouali
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-UM-ENSCM, 8 rue de l’Ecole Normale, 34296 Montpellier, Cedex 05, France
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36
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Takeda N, Oma R, Unno M. Crystal structure of chlorido-{tris-[2-(iso-propyl-sulfan-yl)phen-yl]phosphane-κ 4 P, S, S', S''}nickel(II) tri-fluoro-methane-sulfonate. Acta Crystallogr E Crystallogr Commun 2019; 75:350-353. [PMID: 30867947 PMCID: PMC6399686 DOI: 10.1107/s2056989019002068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 02/06/2019] [Indexed: 12/03/2022]
Abstract
The complex cation of the title compound has a five-coordinate slightly distorted trigonal–bipyramidal structure in which three S atoms are located in the equatorial positions, and one P and one Cl atom in the apical positions. The complex cation of the title compound, [NiCl{P(C6H4-2-S-i-Pr)3}](CF3SO3), has a slightly distorted trigonal–bipyramidal coordination geometry in which three S atoms are located in the equatorial plane, and one P and one Cl atom in the apical positions. In the cation, there are two intramolecular C—H⋯S hydrogen bonds. In the crystal, there are some intermolecular C—H⋯O and C—H⋯F hydrogen bonds formed between the cation and the anion. The trifluoromethanesulfonate anion and one of the methyl groups are both disordered over two sets of sites with occupancies of 0.629 (17):0.371 (17) and 0.786 (14):0.214 (14), respectively.
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Affiliation(s)
- Nobuhiro Takeda
- Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Rin Oma
- Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Masafumi Unno
- Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan
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37
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Affiliation(s)
- Toru Tanaka
- Hitachi Chemical Company, Ltd., 48 Wadai, Tsukuba 300-4247, Japan
| | | | - Takashi Kawamori
- Hitachi Chemical Company, Ltd., 48 Wadai, Tsukuba 300-4247, Japan
| | - Rungthip Kunthom
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
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38
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Uchida T, Egawa Y, Adachi T, Oguri N, Kobayashi M, Kudo T, Takeda N, Unno M, Tanaka R. Cover Feature: Synthesis, Structures, and Thermal Properties of Symmetric and Janus “Lantern Cage” Siloxanes (Chem. Eur. J. 7/2019). Chemistry 2019. [DOI: 10.1002/chem.201806331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Taishi Uchida
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology; Gunma University; Kiryu 376-8515 Gunma Japan
| | - Yasunobu Egawa
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology; Gunma University; Kiryu 376-8515 Gunma Japan
- Present Address: Frontier Research Group, Research and Development (R&D) Center for Marine Bioscience; Japan Agency for Marine-Earth Science and Technology (JAMSTEC); 2-15 Natsushima-cho Yokosuka 237-0061 Kanagawa Japan
| | - Takuto Adachi
- Inorganic Materials Chemistry Group; Sagami Chemical Research Institute; Ayase 252-1193 Kanagawa Japan
| | - Naoki Oguri
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology; Gunma University; Kiryu 376-8515 Gunma Japan
| | - Masato Kobayashi
- Department of Pure and Applied Science, Graduate School of Science and Technology; Gunma University; Kiryu 376-8515 Gunma Japan
| | - Takako Kudo
- Department of Pure and Applied Science, Graduate School of Science and Technology; Gunma University; Kiryu 376-8515 Gunma Japan
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology; Gunma University; Kiryu 376-8515 Gunma Japan
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology; Gunma University; Kiryu 376-8515 Gunma Japan
| | - Ryoji Tanaka
- Inorganic Materials Chemistry Group; Sagami Chemical Research Institute; Ayase 252-1193 Kanagawa Japan
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Uchida T, Egawa Y, Adachi T, Oguri N, Kobayashi M, Kudo T, Takeda N, Unno M, Tanaka R. Synthesis, Structures, and Thermal Properties of Symmetric and Janus "Lantern Cage" Siloxanes. Chemistry 2019; 25:1683-1686. [PMID: 30511778 DOI: 10.1002/chem.201805200] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 11/21/2018] [Indexed: 11/11/2022]
Abstract
Symmetric and asymmetric (Janus-type) new "lantern cage" siloxanes (PhSiO1.5 )4 (Me2 SiO)4 (RSiO1.5 )4 (R=Ph or iBu) were synthesized through reaction of all-cis-[PhSi(OSiMe2 Br)O]4 with all-cis-[RSi(OH)O]4 (R=Ph or iBu). These precursors were obtained by facile two or three-step reactions from commercially available compounds. The spectroscopic properties of the resulting products were fully characterized and they showed high thermal stability and sublimation without decomposition. The crystal structures clearly indicated that the internal vacancy volumes of the lantern cages are considerably larger than that of octaphenylsilsesquioxane (PhSiO1.5 )8 . DFT calculations of the lantern cage showed a distinctly different electronic state from that of octasilsesquioxane. These results suggest that lantern cage siloxanes have a characteristic "field" in the molecule.
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Affiliation(s)
- Taishi Uchida
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Gunma, Japan
| | - Yasunobu Egawa
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Gunma, Japan.,Present Address: Frontier Research Group, Research and Development (R&D) Center for Marine Bioscience, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Kanagawa, Japan
| | - Takuto Adachi
- Inorganic Materials Chemistry Group, Sagami Chemical Research Institute, Ayase, 252-1193, Kanagawa, Japan
| | - Naoki Oguri
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Gunma, Japan
| | - Masato Kobayashi
- Department of Pure and Applied Science, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Gunma, Japan
| | - Takako Kudo
- Department of Pure and Applied Science, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Gunma, Japan
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Gunma, Japan
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, 376-8515, Gunma, Japan
| | - Ryoji Tanaka
- Inorganic Materials Chemistry Group, Sagami Chemical Research Institute, Ayase, 252-1193, Kanagawa, Japan
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Onodera Y, Nakano T, Fukutomi T, Naitoh T, Unno M, Shibata C, Kamei T. Thoracoscopic Esophagectomy for a Patient With Perforated Esophageal Epiphrenic Diverticulum After Kidney Transplantation: A Case Report. Transplant Proc 2018; 50:3964-3967. [PMID: 30577297 DOI: 10.1016/j.transproceed.2018.08.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 08/29/2018] [Indexed: 10/28/2022]
Abstract
A 58-year-old man who underwent cadaveric kidney transplantation twice presented to hospital with a perforated epiphrenic diverticulum. Computed tomography revealed epiphrenic diverticulitis and right pleural effusion. Upper gastrointestinal fibroscopy showed an epiphrenic diverticulum full of food residue. He was transferred to our hospital, where we performed percutaneous endoscopic gastrostomy under general anesthesia in the supine position before thoracoscopy. Thoracoscopic esophagectomy was performed in the semi-prone position under 6-10 mmHg artificial pneumothorax via the right thoracic cavity. We performed subtotal esophagectomy to remove sources of infection because the esophageal wall surrounding the diverticulum was too thick to close or to perform diverticulectomy. A cervical esophagostomy was constructed after the thoracic procedure. The patient was managed with continuous hemodiafiltration and administered immunosuppressants and steroids to preserve the transplanted kidney. Continuous hemodiafiltration was stopped on postoperative day (POD) 4. The patient was discharged from the intensive care unit on POD 10 and transferred to the original hospital on POD 24 for rehabilitation. The second operative stage was performed on POD 157 at our hospital. We performed gastric tube reconstruction via the ante-sternal route and anastomosed the tube to the cervical esophagus. The postoperative course was uneventful; the patient was transferred to the original hospital on POD 15 after the second operation. Minimally invasive surgery was sufficient to treat perforated epiphrenic diverticulum while preserving the transplanted kidney. We recommend completely removing the source of infection and reducing surgical invasiveness to preserve the transplanted kidney in cases of esophageal perforation following kidney transplantation.
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Affiliation(s)
- Y Onodera
- Department of Surgery, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai Miyagi, Japan
| | - T Nakano
- Division of Gastroenterological and Hepatobiliarypancreatic Surgery, Tohoku Medical and Pharmaceutical University, Miyagino-ku, Sendai Miyagi, Japan.
| | - T Fukutomi
- Department of Surgery, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai Miyagi, Japan
| | - T Naitoh
- Department of Surgery, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai Miyagi, Japan
| | - M Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai Miyagi, Japan
| | - C Shibata
- Division of Gastroenterological and Hepatobiliarypancreatic Surgery, Tohoku Medical and Pharmaceutical University, Miyagino-ku, Sendai Miyagi, Japan
| | - T Kamei
- Department of Surgery, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai Miyagi, Japan
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Miyagi S, Nakanishi C, Hara Y, Nakanishi W, Tokodai K, Shimizu K, Uematsu S, Kumata H, Kakizaki Y, Goto M, Kamei T, Unno M, Satomi S. Correlation Between Splenectomy and Portal Vein Complications in Living Donor Liver Transplantation. Transplant Proc 2018; 50:2611-2613. [PMID: 30401361 DOI: 10.1016/j.transproceed.2018.03.104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Accepted: 03/06/2018] [Indexed: 12/27/2022]
Abstract
OBJECTIVES In adults undergoing living donor liver transplantation (LDLT), the transplanted livers are partial grafts, and the portal venous pressure is higher than that observed with whole liver grafts. In patients undergoing LDLT concomitant with splenomegaly, portal venous flow is often diverted to collateral vessels, leading to a high risk of portal vein thrombosis. In such cases, occlusion of the collateral veins is important; however, complete occlusion of all collaterals without blocking the blood flow through the splenic artery causes portal hypertension and liver failure. We aimed to examine the effect of performing a splenectomy concomitant with LDLT to reduce portal vein complications. METHODS Between 1991 and 2017, we performed 170 LDLT operations, including 83 in adults. For this cohort study, adult cases were divided into 2 groups. Group I was those who underwent LDLT without splenectomy (n = 60); Group II was those who underwent LDLT with splenectomy for the reduction of portal hypertension (n = 23). We investigated the incident rates of complications, including blood loss, lethal portal vein thrombosis (intrahepatic thrombosis), acute rejection, and so on. We also investigated the survival rates in both groups. RESULTS The incident rate of lethal portal vein thrombosis in Group II was significantly lower than that observed in Group I (4.4% vs 21.7%, respectively, P = .0363). There were no statistically significant differences observed between the groups with respect to blood loss, survival rates, and other such parameters. CONCLUSION LDLT concomitant with splenectomy might effectively reduce the occurrence of portal vein complications in adults.
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Affiliation(s)
- S Miyagi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | - C Nakanishi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Y Hara
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - W Nakanishi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - K Tokodai
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - K Shimizu
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - S Uematsu
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - H Kumata
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Y Kakizaki
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - M Goto
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - T Kamei
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - M Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - S Satomi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
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Miyazawa K, Miyagi S, Nakanishi C, Hara Y, Tokodai K, Nakanishi W, Uematsu S, Shimizu K, Goto M, Kamei T, Unno M. Effect of Middle Hepatic Vein Tributaries Preserving Technique Until Just Before Graft Retrieval on Donors' Surgical Outcomes in Living Donor Liver Transplantation. Transplant Proc 2018; 50:2636-2639. [PMID: 30401365 DOI: 10.1016/j.transproceed.2018.03.092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 03/02/2018] [Indexed: 11/15/2022]
Abstract
BACKGROUND The technique of preserving the major tributaries of the middle hepatic vein (MHV) (V5 and V8) until just before graft retrieval is beneficial to minimize congestion time of the graft. However, it remains unclear whether this technique exerts a burden on donors in terms of operative time, blood loss, and postoperative hepatic dysfunction. In this study we investigated adverse effects of the MHV tributaries preserving technique until immediately before graft retrieval on donors' surgical outcomes. METHODS Data from 71 donors who underwent right hepatectomy without MHV for a liver transplantation at our hospital from January 2002 to August 2016 were retrospectively reviewed. Donors were divided into 3 groups as follows: group 1 (n = 12), no MHV tributary reconstruction; group 2 (n = 33), single MHV tributary reconstruction; group 3 (n = 26), 2 or 3 MHV tributaries reconstruction. Donor operation time, blood loss, proportion of the remnant liver, maximum postoperative total bilirubin, aspartate aminotransferase, alanine transaminase, minimum platelets, prothrombin time, albumin level, number of days in hospital from surgery to discharge, and surgical complications were compared. RESULTS Compared with groups 2 and 3, group 1 exhibited shorter average operational time and less average blood loss, but the difference was not significant. Comparisons of all other factors indicated no significant differences. CONCLUSION The technique of preserving the major tributaries of the MHV until just immediately before graft retrieval does not appear to impose an apparent burden on donors.
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Affiliation(s)
- K Miyazawa
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
| | - S Miyagi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - C Nakanishi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Y Hara
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - K Tokodai
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan; Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - W Nakanishi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - S Uematsu
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - K Shimizu
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - M Goto
- Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - T Kamei
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - M Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
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Karasawa H, Ohnuma S, Suzuki H, Kohyama A, Watanabe K, Kamei T, Naitoh T, Unno M. The role of perioperative radiotherapy for patients with local recurrence of rectal cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy431.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Aizawa T, Karasawa H, Suzuki H, Yamamura A, Ohnuma S, Kamei T, Naitoh T, Unno M. Molecular characterization of cancer associated fibroblasts in colorectal cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy431.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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45
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Sato H, Yamamura A, Matsuo J, Hossain Z, Osato M, Naitoh T, Kamei T, Unno M, Ito Y. Runx1 enhancer element marks stem/progenitor cells in pancreas and can be an origin of cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy432.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Emi Y, Yamanaka T, Muro K, Uetake H, Oki E, Takahashi T, Katayose Y, Yoshida K, Sakamoto M, Aishima S, Ishida K, Imura J, Unno M, Hyodo I, Tomita N, Sugihara K, Maehara Y. Histopathologic evaluation of patients with liver-limited metastatic colorectal cancer receiving mFOLFOX6 plus bevacizumab or mFOLFOX6 plus cetuximab: The ATOM trial. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy281.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Affiliation(s)
- Shin-ichi Kondo
- Department of Science, Faculty of Science,Yamagata University, Yamagata, Japan
| | - Yasunori Nakadai
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, Gunma, Japan
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, Gunma, Japan
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48
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Sasajima H, Miyagi S, Kakizaki Y, Kamei T, Unno M, Satomi S, Goto M. Cytoprotective Effects of Mesenchymal Stem Cells During Liver Transplantation from Donors After Cardiac Death in Rats. Transplant Proc 2018; 50:2815-2820. [PMID: 30401403 DOI: 10.1016/j.transproceed.2018.02.180] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Accepted: 02/19/2018] [Indexed: 02/09/2023]
Abstract
BACKGROUND Liver transplantation from donors after cardiac death (DCD) might increase the pool of available organs. Recently, some investigators reported the potential use of mesenchymal stem cells (MSCs) to improve the outcome of liver transplantation from DCD. The aim of this study was to evaluate the cytoprotective effects and safety of MSC transplantation on liver grafts from DCD. METHODS Rats were divided into 4 groups (n = 5) as follows: 1. the heart-beating group, in which liver grafts were retrieved from heart-beating donors; 2. the DCD group, in which liver grafts were retrieved from DCD that had experienced apnea-induced agonal conditions; 3. the MSC-1 group, and 4. the MSC-2 group, in which liver grafts were retrieved as with the DCD group, but were infused MSCs (2.0 × 105 or 1.0 × 106, respectively). The retrieved livers were perfused with oxygenated Krebs-Henseleit bicarbonate buffer (37°C) through the portal vein for 2 hours after 6 hours of cold preservation. Perfusate, bile, and liver tissues were then investigated. RESULTS Bile production in the MSC-2 group was significantly improved compared with that in the DCD group. Based on histologic findings, narrowing of the sinusoidal space in the both MSC groups was improved compared with that in the DCD group. CONCLUSIONS MSCs could protect the function of liver grafts from warm ischemia-reperfusion injury and improve the viability of DCD liver grafts. In addition, we found that the infusion of 1.0 × 106 MSCs does not obstruct the hepatic sinusoids of grafts from DCD.
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Affiliation(s)
- H Sasajima
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | - S Miyagi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Y Kakizaki
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - T Kamei
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - M Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - S Satomi
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - M Goto
- Division of Transplantation and Regenerative Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
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Miyagi S, Shimizu K, Miyazawa K, Nakanishi W, Hara Y, Tokodai K, Nakanishi C, Satomi S, Goto M, Unno M, Kamei T. A Case of Successful Simultaneous Pancreas-Kidney Transplantation Using the Injured Pancreas Graft. Transplant Proc 2017; 49:2315-2317. [PMID: 29198668 DOI: 10.1016/j.transproceed.2017.10.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Graft injuries sometimes occur and may cause complications such as the leakage of pancreatic secretions, which is often lethal. We report our experience of a case of successful simultaneous pancreas-kidney transplantation using injured pancreas graft. PATIENTS AND METHODS The recipient was a 57-year-old woman with type 1 diabetes mellitus, and the donor was a 30-year-old man with a brain injury. In the donation, the pancreas parenchyma, splenic artery, and gastroduodenal artery were injured iatrogenically. We therefore reconstructed these arteries using vessel grafts and then performed simultaneous pancreas-kidney transplantation. RESULTS Five days after transplantation, we noted a high titer of amylase in the ascites; therefore, we performed an urgent laparotomy. The origin of the amylase was the injured pancreatic parenchyma, and continued washing and drainage were carried out. We reconstructed the duodenojejunostomy using the Roux-en-Y technique to separate the passage of food from the pancreas graft to prevent injury to other organs due to exposure to pancreatic secretions. Thereafter, we inserted a decompression tube into the anastomosis thorough the blind end of the jejunum. Finally, we inserted 3 drainage tubes for lavage. Following this procedure, the patient recovered gradually and no longer required hemodialysis and insulin therapy. She was discharged from our hospital 56 days after transplantation. CONCLUSION The restoration of the injured graft was possible by management of pancreatic secretions and use of the donor's vessel grafts. Shortage of donors is a problem throughout the world; thus, it is important to use injured grafts for transplantation if possible.
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Affiliation(s)
- S Miyagi
- Department of Surgery, Tohoku University, Aoba-ku, Sendai, Japan.
| | - K Shimizu
- Department of Surgery, Tohoku University, Aoba-ku, Sendai, Japan
| | - K Miyazawa
- Department of Surgery, Tohoku University, Aoba-ku, Sendai, Japan
| | - W Nakanishi
- Department of Surgery, Tohoku University, Aoba-ku, Sendai, Japan
| | - Y Hara
- Department of Surgery, Tohoku University, Aoba-ku, Sendai, Japan
| | - K Tokodai
- Department of Surgery, Tohoku University, Aoba-ku, Sendai, Japan
| | - C Nakanishi
- Department of Surgery, Tohoku University, Aoba-ku, Sendai, Japan
| | - S Satomi
- Department of Surgery, Tohoku University, Aoba-ku, Sendai, Japan
| | - M Goto
- Department of Surgery, Tohoku University, Aoba-ku, Sendai, Japan
| | - M Unno
- Department of Surgery, Tohoku University, Aoba-ku, Sendai, Japan
| | - T Kamei
- Department of Surgery, Tohoku University, Aoba-ku, Sendai, Japan
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Ishida M, Sakata N, Ise I, Ono T, Shimura M, Ishii K, Murakami M, Takadate T, Aoki T, Kudo K, Ohnuma S, Fukase K, Ohtsuka H, Mizuma M, Hayashi H, Nakagawa K, Morikawa T, Motoi F, Naitoh T, Unno M. The comparative anatomy of the folds, fossae, and adhesions around the duodenojejunal flexure in mammals. Folia Morphol (Warsz) 2017; 77:286-292. [PMID: 29064554 DOI: 10.5603/fm.a2017.0089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 08/29/2017] [Accepted: 09/20/2017] [Indexed: 11/25/2022]
Abstract
BACKGROUND Anatomical knowledge of the duodenojejunal flexure is necessary for abdominal surgeries, and also important for physiologic studies about the duodenum. But little is known about the anatomy of this region in mammals. Here, we examined comparative anatomy to understand the anatomical formation of the duodenojejunal flexure in mammals. MATERIALS AND METHODS The areas around the duonenojejunal flexure were ob-served in mouse, rat, dog, pig, and human, and the anatomical structures around the duodenojejunal junction in the animals were compared with those in human. RESULTS The superior and inferior duodenal folds, and the superior and inferior duodenal fossae were identified in all examined humans. In pig, the structures were not clearly identified because the duodenum strongly adhered to the retroperitoneum and to the mesocolon. In mouse, rat, and dog, only the plica duodenocolica, which is regarded as the animal counterpart of the superior duo-denal fold in human, was identified, and other folds or fossae were not observed, probably because the duodenum was not fixed to the parietal peritoneum in those animals. Transection of the plica duodenocolica could return the normally rotated intestine back to the state of non-rotation in rat. CONCLUSIONS This study showed the anatomical similarities and dissimilarities of the duodenojejunal flexure among the mammals. Anatomical knowledge of the area is useful for duodenal and pancreatic surgeries, and for animal studies about the duodenum. (Folia Morphol 2018; 77, 2: 286-292).
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