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Choi G, Rejinold NS, Piao H, Choy JH. Inorganic-inorganic nanohybrids for drug delivery, imaging and photo-therapy: recent developments and future scope. Chem Sci 2021; 12:5044-5063. [PMID: 34168768 PMCID: PMC8179608 DOI: 10.1039/d0sc06724e] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 02/09/2021] [Indexed: 12/13/2022] Open
Abstract
Advanced nanotechnology has been emerging rapidly in terms of novel hybrid nanomaterials that have found various applications in day-to-day life for the betterment of the public. Specifically, gold, iron, silica, hydroxy apatite, and layered double hydroxide based nanohybrids have shown tremendous progress in biomedical applications, including bio-imaging, therapeutic delivery and photothermal/dynamic therapy. Moreover, recent progress in up-conversion nanohybrid materials is also notable because they have excellent NIR imaging capability along with therapeutic benefits which would be useful for treating deep-rooted tumor tissues. Our present review highlights recent developments in inorganic-inorganic nanohybrids, and their applications in bio-imaging, drug delivery, and photo-therapy. In addition, their future scope is also discussed in detail.
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Affiliation(s)
- Goeun Choi
- Intelligent Nanohybrid Materials Laboratory (INML), Institute of Tissue Regeneration Engineering (ITREN), Dankook University Cheonan 31116 Republic of Korea
- College of Science and Technology, Dankook University Cheonan 31116 Republic of Korea
| | - N Sanoj Rejinold
- Intelligent Nanohybrid Materials Laboratory (INML), Institute of Tissue Regeneration Engineering (ITREN), Dankook University Cheonan 31116 Republic of Korea
| | - Huiyan Piao
- Intelligent Nanohybrid Materials Laboratory (INML), Institute of Tissue Regeneration Engineering (ITREN), Dankook University Cheonan 31116 Republic of Korea
| | - Jin-Ho Choy
- Intelligent Nanohybrid Materials Laboratory (INML), Institute of Tissue Regeneration Engineering (ITREN), Dankook University Cheonan 31116 Republic of Korea
- Department of Pre-medical Course, College of Medicine, Dankook University Cheonan 31116 Republic of Korea
- Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovative Research, Tokyo Institute of Technology Yokohama 226-8503 Japan
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Electrostatic Interaction of Point Charges in Three-Layer Structures: The Classical Model. CONDENSED MATTER 2019. [DOI: 10.3390/condmat4020044] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Electrostatic interaction energy W between two point charges in a three-layer plane system was calculated on the basis of the Green’s function method in the classical model of constant dielectric permittivities for all media involved. A regular method for the calculation of W ( Z , Z ′ , R ) , where Z and Z ′ are the charge coordinates normal to the interfaces, and R the lateral (along the interfaces) distance between the charges, was proposed. The method consists in substituting the evaluation of integrals of rapidly oscillating functions over the semi-infinite interval by constructing an analytical series of inverse radical functions to a required accuracy. Simple finite-term analytical approximations of the dependence W ( Z , Z ′ , R ) were proposed. Two especially important particular cases of charge configurations were analyzed in more detail: (i) both charges are in the same medium and Z = Z ′ ; and (ii) the charges are located at different interfaces across the slab. It was demonstrated that the W dependence on the charge–charge distance S = R 2 + Z − Z ′ 2 differs from the classical Coulombic one W ∼ S − 1 . This phenomenon occurs due to the appearance of polarization charges at both interfaces, which ascribes a many-body character to the problem from the outset. The results obtained testify, in particular, that the electron–hole interaction in heterostructures leading to the exciton formation is different in the intra-slab and across-slab charge configurations, which is usually overlooked in specific calculations related to the subject concerned. Our consideration clearly demonstrates the origin, the character, and the consequences of the actual difference. The often used Rytova–Keldysh approximation was analyzed. The cause of its relative success was explained, and the applicability limits were determined.
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Djebbi MA, Bouaziz Z, Elabed A, Sadiki M, Elabed S, Namour P, Jaffrezic-Renault N, Amara ABH. Preparation and optimization of a drug delivery system based on berberine chloride-immobilized MgAl hydrotalcite. Int J Pharm 2016; 506:438-48. [DOI: 10.1016/j.ijpharm.2016.04.048] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 04/07/2016] [Accepted: 04/12/2016] [Indexed: 12/31/2022]
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Kim JM, Kim YI, Park CS, Park CH. Transformation of a layered perovskite to a defect perovskite via cooperative Li-insertion and O/N substitution. Dalton Trans 2014; 43:16830-7. [PMID: 25293628 DOI: 10.1039/c4dt02335h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Defect perovskite oxynitrides containing lithium on the octahedral sites, i.e., Sr(1-x)(Li(x)Ta(1-x))(O(3.5-3x-3y)N(2y)), were produced by the ammonolytic heating of a layered perovskite, Sr2Ta2O7, with Li2CO3. The above phase evolution involved the thermal diffusion of Li(+) into the Sr2Ta2O7 lattice and concurrent 3O(2-) → 2N(3-) substitution. The concentrations of Li, N, and anion vacancies in the product oxynitride could be controlled by adjusting the Li2CO3 to Sr2Ta2O7 ratio in the reactant mixture. This study identified three different compositions, Sr(0.92)Li(0.08)Ta(0.92)O(1.91)N(0.89), Sr(0.83)Li(0.17)Ta(0.83)O(1.88)N(0.74) and Sr(0.73)Li(0.27)Ta(0.73)O(1.82)N(0.58), where an increase in the Li composition accompanied decreases in the a- and c-parameters of the tetragonal cell, along with an increase in the band gap. Neutron diffraction and solid state (7)Li nuclear magnetic resonance spectroscopy of Sr(1-x)(Li(x)Ta(1-x))(O(3.5-3x-3y)N(2y)) showed that Li occupied the octahedral site, and these oxynitrides exhibited enhanced bond covalency compared to similar oxides.
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Affiliation(s)
- Jung-Mi Kim
- Department of Chemistry, Yeungnam University, Gyeongsan 712-749, Republic of Korea.
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Choi G, Kwon OJ, Oh Y, Yun CO, Choy JH. Inorganic nanovehicle targets tumor in an orthotopic breast cancer model. Sci Rep 2014; 4:4430. [PMID: 24651154 PMCID: PMC3961742 DOI: 10.1038/srep04430] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Accepted: 03/06/2014] [Indexed: 11/09/2022] Open
Abstract
The clinical efficacy of conventional chemotherapeutic agent, methotrexate (MTX), can be limited by its very short plasma half-life, the drug resistance, and the high dosage required for cancer cell suppression. In this study, a new drug delivery system is proposed to overcome such limitations. To realize such a system, MTX was intercalated into layered double hydroxides (LDHs), inorganic drug delivery vehicle, through a co-precipitation route to produce a MTX-LDH nanohybrid with an average particle size of approximately 130 nm. Biodistribution studies in mice bearing orthotopic human breast tumors revealed that the tumor-to-liver ratio of MTX in the MTX-LDH-treated-group was 6-fold higher than that of MTX-treated-one after drug treatment for 2 hr. Moreover, MTX-LDH exhibited superior targeting effect resulting in high antitumor efficacy inducing a 74.3% reduction in tumor volume compared to MTX alone, and as a consequence, significant survival benefits. Annexin-V and propidium iodine dual staining and TUNEL analysis showed that MTX-LDH induced a greater degree of apoptosis than free MTX. Taken together, our data demonstrate that a new MTX-LDH nanohybrid exhibits a superior efficacy profile and improved distribution compared to MTX alone and has the potential to enhance therapeutic efficacy via inhibition of tumor proliferation and induction of apoptosis.
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Affiliation(s)
- Goeun Choi
- Center for Intelligent Nano-Bio Materials (CINBM), Department of Chemistry and Nano Science (Ewha Global Top 5 program-2011) and Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Republic of Korea
| | - Oh-Joon Kwon
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul 133-791, Republic of Korea
| | - Yeonji Oh
- Center for Intelligent Nano-Bio Materials (CINBM), Department of Chemistry and Nano Science (Ewha Global Top 5 program-2011) and Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Republic of Korea
| | - Chae-Ok Yun
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul 133-791, Republic of Korea
| | - Jin-Ho Choy
- Center for Intelligent Nano-Bio Materials (CINBM), Department of Chemistry and Nano Science (Ewha Global Top 5 program-2011) and Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Republic of Korea
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Lee JH, Choi G, Oh YJ, Park JW, Choy YB, Park MC, Yoon YJ, Lee HJ, Chang HC, Choy JH. A nanohybrid system for taste masking of sildenafil. Int J Nanomedicine 2012; 7:1635-49. [PMID: 22619517 PMCID: PMC3356190 DOI: 10.2147/ijn.s28264] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
A nanohybrid was prepared with an inorganic clay material, montmorillonite (MMT), for taste masking of sildenafil (SDN). To further improve the taste-masking efficiency and enhance the drug-release rate, we coated the nanohybrid of SDN-MMT with a basic polymer, polyvinylacetal diethylaminoacetate (AEA). Powder X-ray diffraction and Fourier transform infrared experiments showed that SDN was successfully intercalated into the interlayer space of MMT. The AEA-coated SDN-MMT nanohybrid showed drug release was much suppressed at neutral pH (release rate, 4.70 ± 0.53%), suggesting a potential for drug taste masking at the buccal cavity. We also performed in vitro drug release experiments in a simulated gastric fluid (pH = 1.2) and compared the drug-release profiles of AEA-coated SDN-MMT and Viagra(®), an approved dosage form of SDN. As a result, about 90% of SDN was released from the AEA-coated SDN-MMT during the first 2 hours while almost 100% of drug was released from Viagra(®). However, an in vivo experiment showed that the AEA-coated SDN-MMT exhibited higher drug exposure than Viagra(®). For the AEA-coated SDN-MMT, the area under the plasma concentration- time curve from 0 hours to infinity (AUC(0-∞)) and maximum concentration (C(max)) were 78.8 ± 2.32 μg · hour/mL and 12.4 ± 0.673 μg/mL, respectively, both of which were larger than those obtained with Viagra(®) (AUC(0-∞) = 69.2 ± 3.19 μg · hour/mL; C(max) = 10.5 ± 0.641 μg/mL). Therefore, we concluded that the MMT-based nanohybrid is a promising delivery system for taste masking of SDN with possibly improved drug exposure.
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Affiliation(s)
- Ji-Hee Lee
- Center for Intelligent Nano-Bio Materials (CINBM), Department of Bioinspired Science, Ewha Womans University, Seoul, Korea
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Si S, Taubert A, Mantion A, Rogez G, Rabu P. Peptide-intercalated layered metal hydroxides: effect of peptide chain length and side chain functionality on structural, optical and magnetic properties. Chem Sci 2012. [DOI: 10.1039/c2sc01087a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Choi SJ, Choy JH. Layered double hydroxide nanoparticles as target-specific delivery carriers: uptake mechanism and toxicity. Nanomedicine (Lond) 2011; 6:803-14. [PMID: 21793673 DOI: 10.2217/nnm.11.86] [Citation(s) in RCA: 154] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Layered double hydroxides (LDHs), also known as anionic nanoclays or hydrotalcite-like compounds, have attracted a great deal of interest for their potential as delivery carriers. In this article, we describe the cellular uptake behaviors and uptake pathway of LDHs in vitro and in vivo, which can not only explain the mechanism by which high efficacy of biomolecules delivered through LDH nanocarriers could be obtained, but also provide novel strategies to enhance their delivery efficiency. Toxicological effects of LDHs in cell lines and in animal models are also present, aiming at providing critical information about their toxicity potential, which should be carefully considered for their biomedical application. Understanding the uptake behaviors, uptake mechanism and toxicity of LDHs in terms of dose-response relationship, diverse physicochemical properties and interaction with different biological systems is important to optimize delivery efficiency as well as biocompatibility.
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Affiliation(s)
- Soo-Jin Choi
- Department of Food Science & Technology, Seoul Women's University, Seoul, Korea
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Yang JH, Lee HS, Paek SM, Han YS. SiO2–Fe2O3-pillared Clay Nanohybrid with an Enhanced Gas Removal Property. CHEM LETT 2011. [DOI: 10.1246/cl.2011.1242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Oh JM, Park DH, Choy JH. Integrated bio-inorganic hybrid systems for nano-forensics. Chem Soc Rev 2010; 40:583-95. [PMID: 21152667 DOI: 10.1039/c0cs00051e] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This tutorial review describes a new class of data processing system that applies information theory at the molecular level. We also summarize the recent multidisciplinary advances in biotechnology and nanotechnology that have facilitated the development of reliable nano-level code systems. After a brief introduction of information theory, we present possible ways to adapt this concept to the molecular world. This review explains the requirements and solutions for each step necessary to apply a nano code system to real products. Finally, we introduce a designed nano code system for agricultural products as one example of the many possible applications for nano codes.
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Affiliation(s)
- Jae-Min Oh
- Department of Chemistry and Medical Chemistry, College of Science and Technology, Yonsei University, Wonju, Gangwondo, Korea
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Paek SM, Oh JM, Choy JH. A Lattice-Engineering Route to Heterostructured Functional Nanohybrids. Chem Asian J 2010; 6:324-38. [DOI: 10.1002/asia.201000578] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Indexed: 01/11/2023]
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Chen XG, Wu DD, Lv SS, Zhang L, Ye Y, Cheng JP. Layered double hydroxide/NaSb(OH) 6âpoly(vinyl chloride) nanocomposites: Preparation, characterization, and thermal stability. J Appl Polym Sci 2010. [DOI: 10.1002/app.31555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Kim T, Oh EJ, Jee AY, Lim S, Park D, Lee M, Hyun SH, Choy JH, Hwang SJ. Soft-Chemical Exfoliation Route to Layered Cobalt Oxide Monolayers and Its Application for Film Deposition and Nanoparticle Synthesis. Chemistry 2009; 15:10752-61. [DOI: 10.1002/chem.200901590] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Baker PJ, Lancaster T, Blundell SJ, Pratt FL, Brooks ML, Kwon SJ. Tuning the interlayer spacing of high-T_{c} Bi-based superconductors by intercalation: measuring the penetration depth and the two-dimensional superfluid density. PHYSICAL REVIEW LETTERS 2009; 102:087002. [PMID: 19257777 DOI: 10.1103/physrevlett.102.087002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2008] [Indexed: 05/27/2023]
Abstract
Substantial control of the interlayer spacing in Bi-based high temperature superconductors has been achieved through the intercalation of guest molecules between the superconducting layers. Measurements using implanted muons reveal that the penetration depth increases with increasing layer separation while T_{c} does not vary appreciably, demonstrating that the bulk superfluid density is not the determining factor controlling T_{c}. Our results strongly suggest that for Bi-based high temperature superconductors the superfluid density appearing in the Uemura scaling relation rho_{s} proportional, variantT_{c} should be interpreted as the two-dimensional density within the superconducting layers, which we find to be constant for each class of system investigated.
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Affiliation(s)
- P J Baker
- Department of Physics, Oxford University, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, United Kingdom
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Li C, Wang L, Evans DG, Duan X. Thermal Evolution and Luminescence Properties of Zn−Al-Layered Double Hydroxides Containing Europium(III) Complexes of Ethylenediaminetetraacetate and Nitrilotriacetate. Ind Eng Chem Res 2009. [DOI: 10.1021/ie800342u] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cang Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Lianying Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - David G. Evans
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Xue Duan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
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Taroni A, Bramwell ST, Holdsworth PCW. Universal window for two-dimensional critical exponents. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2008; 20:275233. [PMID: 21694394 DOI: 10.1088/0953-8984/20/27/275233] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Two-dimensional condensed matter is realized in increasingly diverse forms that are accessible to experiment and of potential technological value. The properties of these systems are influenced by many length scales and reflect both generic physics and chemical detail. To unify their physical description is therefore a complex and important challenge. Here we investigate the distribution of experimentally estimated critical exponents, β, that characterize the evolution of the order parameter through the ordering transition. The distribution is found to be bimodal and bounded within a window ∼0.1≤β≤0.25, facts that are only in partial agreement with the established theory of critical phenomena. In particular, the bounded nature of the distribution is impossible to reconcile with the existing theory for one of the major universality classes of two-dimensional behaviour-the XY model with four-fold crystal field-which predicts a spectrum of non-universal exponents bounded only from below. Through a combination of numerical and renormalization group arguments we resolve the contradiction between theory and experiment and demonstrate how the 'universal window' for critical exponents observed in experiment arises from a competition between marginal operators.
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Affiliation(s)
- A Taroni
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
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Park JK, Choy YB, Oh JM, Kim JY, Hwang SJ, Choy JH. Controlled release of donepezil intercalated in smectite clays. Int J Pharm 2008; 359:198-204. [PMID: 18502063 DOI: 10.1016/j.ijpharm.2008.04.012] [Citation(s) in RCA: 125] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2007] [Revised: 03/31/2008] [Accepted: 04/07/2008] [Indexed: 10/22/2022]
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Tretyakov YD, Goodilin EA. Chemical principles of preparation of metal-oxide superconductors. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc2000v069n01abeh000526] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Choy JH, Lee W, Jang ES, Kwon SJ, Hwang SJ, Kim YI. Intercalation Route to Novel Superconducting Nano-Hybrids. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587250008026185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Jin-Ho Choy
- a Department of Chemistry , The College of Natural Sciences, Seoul National University , Seoul , 151-742 , Korea
| | - Woo Lee
- a Department of Chemistry , The College of Natural Sciences, Seoul National University , Seoul , 151-742 , Korea
| | - Eue-Soon Jang
- a Department of Chemistry , The College of Natural Sciences, Seoul National University , Seoul , 151-742 , Korea
| | - Soon-Jae Kwon
- a Department of Chemistry , The College of Natural Sciences, Seoul National University , Seoul , 151-742 , Korea
| | - Seong-Ju Hwang
- a Department of Chemistry , The College of Natural Sciences, Seoul National University , Seoul , 151-742 , Korea
| | - Young-Il Kim
- a Department of Chemistry , The College of Natural Sciences, Seoul National University , Seoul , 151-742 , Korea
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Chung IW, Kwon SJ, Kim SJ, Jang ES, Hwang SJ, Choy JH. Evidence of Two-Dimensional Superconductivity in the Single Crystalline Nanohybrid of Organic-Bismuth Cuprate. J Phys Chem B 2006; 110:16197-200. [PMID: 16913741 DOI: 10.1021/jp0632945] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A coordination compound of HgI(2)(pyridine)(2) can be successfully intercalated into a single crystalline Bi(2)Sr(2)CaCu(2)O(y) high-T(c) superconductor through an interlayer complexation reaction between pyridine molecules and bismuth cuprate pre-intercalated with mercuric iodide. X-ray diffraction and X-ray absorption spectroscopic results clearly demonstrate that the single crystalline nature of the pristine bismuth cuprate remains unchanged even after the intercalation of organic complex as well as those of iodine and mercuric iodide. According to the angle-dependent dc magnetization measurements, the intercalation of bulky organic molecules completely blocks superconductive currents along the c-axis, whereas a superconducting transition along the in-plane direction still occurs in the organic intercalate. In the case of the iodine or mercuric iodide intercalates with smaller lattice expansions, an out-of-plane diamagnetic transition is not wholly quenched but significantly depressed by the intercalation, confirming the reduction of interlayer interaction. The present finding can provide straightforward evidence of the two-dimensionality of high temperature superconductivity in the present cuprate-based nanohybrid material.
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Wang ZL, Kang ZH, Wang EB, Su ZM, Xu L. Intercalation and Photophysical Properties of the Tetra-(8-hydroxyquinolinato) Boron Complex and 3,3‘,4,4‘-Benzophenone Tetracarboxylic Anion into Mg−Al Layered Double Hydroxides. Inorg Chem 2006; 45:4364-71. [PMID: 16711685 DOI: 10.1021/ic0519887] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The tetra-(8-hydroxyquinolinato) boron complex (Bq) and 3,3',4,4'-benzophenone tetracarboxylic anion (BPTC) were successfully intercalated into layered double hydroxides with an ion-exchange method. Elemental analyses, powder X-ray diffraction, FTIR spectra, and thermogravimetric analyses indicated that the hydrothermal treatment could efficiently improve the reaction process, the purity and crystallinity of products, and that Bq and BPTC molecules steadily arranged with C2 axis perpendicular to the layer plane, and the J-type aggregate in the host interlayer, respectively. The fluorescence studies showed that, compared with those observed in the dilute solutions of the guests, the spectra of Mg3Al-Bq and Mg3Al-BPTC evolved to the high-energy side and the low-energy side with increasing their loading, respectively, which were attributed to various arrangements of guests and the increased intermolecular interaction. Furthermore, their fluorescence intensity gradually decreased with increasing the intercalated guest content due to the concentration quenching, and Mg3Al-Bq exhibits enhanced solid-state blue luminescence due to a more rigid and constrained environment of the host.
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Affiliation(s)
- Zhong-Liang Wang
- Institute of Polyoxometalate Chemistry, Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P.R. China
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Guldi DM, Rahman GMA, Sgobba V, Kotov NA, Bonifazi D, Prato M. CNT−CdTe Versatile Donor−Acceptor Nanohybrids. J Am Chem Soc 2006; 128:2315-23. [PMID: 16478187 DOI: 10.1021/ja0550733] [Citation(s) in RCA: 193] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Single wall carbon nanotubes (SWNT) and multiwall carbon nanotubes (MWNT) were linked to thioglycolic acid (TGA)-capped CdTe nanoparticles (NP) through electrostatic interactions producing photoactive superstructures. The novel nanohybrids were characterized both in the ground and excited states with specific accent on electron-transfer chemistry. In fact, both assays provide kinetic and spectroscopic evidence that support a partial transfer of charge density, with rapid formation of microsecond-lived radical ion pair states. Since nanotubes provide a quick transportation route of charge carriers to the electrode, we took this remarkable finding further and constructed photoelectrochemical cells. Photocurrents were generated through the implementation of CdTe and SWNT or MWNT, which serve as excited-state electron donor components and electron acceptors, respectively.
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Affiliation(s)
- Dirk M Guldi
- Contribution from the Institute for Physical and Theoretical Chemistry, Universität Erlangen, 91058 Erlangen, Germany.
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Wang Z, Wang E, Gao L, Xu L. Synthesis and properties of Mg2Al layered double hydroxides containing 5-fluorouracil. J SOLID STATE CHEM 2005. [DOI: 10.1016/j.jssc.2004.11.005] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hwang SJ, Park DH, Choy JH. Influence of Host Lattice on the Chemical Bonding Nature of Guest Species in High-Tc Superconducting I−Bi2Sr1.5-xLaxCa1.5Cu2Oy Nanohybrids. J Phys Chem B 2004. [DOI: 10.1021/jp047908m] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Seong-Ju Hwang
- Department of Applied Chemistry, Center for Optoelectronic and Microwave Devices, College of Natural Sciences, Konkuk University Chungju Campus, Chungju, Chungbuk 380-701, Korea, and National Nanohybrid Materials Laboratory, School of Chemistry, Seoul National University, Seoul 151-747, Korea
| | - Dae Hoon Park
- Department of Applied Chemistry, Center for Optoelectronic and Microwave Devices, College of Natural Sciences, Konkuk University Chungju Campus, Chungju, Chungbuk 380-701, Korea, and National Nanohybrid Materials Laboratory, School of Chemistry, Seoul National University, Seoul 151-747, Korea
| | - Jin-Ho Choy
- Department of Applied Chemistry, Center for Optoelectronic and Microwave Devices, College of Natural Sciences, Konkuk University Chungju Campus, Chungju, Chungbuk 380-701, Korea, and National Nanohybrid Materials Laboratory, School of Chemistry, Seoul National University, Seoul 151-747, Korea
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Choy JH, Jung JS, Oh JM, Park M, Jeong J, Kang YK, Han OJ. Layered double hydroxide as an efficient drug reservoir for folate derivatives. Biomaterials 2004; 25:3059-64. [PMID: 14967539 DOI: 10.1016/j.biomaterials.2003.09.083] [Citation(s) in RCA: 367] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2003] [Accepted: 09/19/2003] [Indexed: 11/22/2022]
Abstract
Folic acid derivatives such as folinic acid and methotrexate (MTX) have been successfully hybridized with layered double hydroxide (LDH) by ion-exchange reaction. The X-ray diffraction patterns and spectroscopic analyses indicate that these molecules intercalated into the hydroxide interlayer space are stabilized in the tilted longitudinal monolayer mode by electrostatic interaction. No significant changes in their structural and functional properties are found in the hybrids. The cellular uptake test of MTX-LDH hybrid is carried out in the fibroblast (human tendon) and SaOS-2 cell line (Osteosarcoma, human) by in vitro MTT (3-(4,5-dimethylthiazol-2-yl) 2,5-diphenyl tetrazolium bromide) assay. The initial proliferation of SaOS-2 cell is more strongly suppressed by treatment with MTX-LDH hybrid than with MTX alone. This study clearly shows that LDH not only plays a role as a biocompatible-delivery matrix for drugs but also facilitates a significant increase in the delivery efficiency.
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Affiliation(s)
- Jin-Ho Choy
- National Nanohybrid Materials Laboratory, School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151 747, South Korea.
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Han DK, Kim SH, Hong KP, Kwon YU, Kim S, Lee JS. Crystal structure and magnetism of layered Ln2Ca2MnNiO8 (Ln=Pr, Nd, Sm, and Gd) compounds. J SOLID STATE CHEM 2004. [DOI: 10.1016/j.jssc.2003.10.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kwon SJ, Choy JH. A Novel Hybrid of Bi-Based High-Tc Superconductor and Molecular Complex. Inorg Chem 2003; 42:8134-6. [PMID: 14658863 DOI: 10.1021/ic034755t] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Molecular complex HgI2Py2 (Py=pyridine) was intercalated into the Bi-based high-Tc cuprate by intercalative complexation. The intercalation method adopted in this work is based on the new concept, where a neutral ligating agent is diffused into the preintercalated HgI2 layer leading to a charge transfer-type complex formation between the Bi2O2 double layers of Bi2Sr2CaCu2Oy.
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Affiliation(s)
- Soon-Jae Kwon
- Department of Chemistry-BK21, Sungkyunkwan University, Suwon 440-746, South Korea.
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Choy JH, Kim YI. Gold Valence in (AuI3)0.25Bi2Sr2CaCu2Oy by XPS and XANES Spectroscopy. J Phys Chem B 2003. [DOI: 10.1021/jp034067v] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jin-Ho Choy
- National Nanohybrid Materials Laboratory, School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-747, Korea
| | - Young-Il Kim
- National Nanohybrid Materials Laboratory, School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-747, Korea
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Choi HJ, Suh MP. Nickel(II) macrocyclic complexes with long alkyl pendant chain: synthesis, x-ray structure, and anion exchange property in the solid state. Inorg Chem 2003; 42:1151-7. [PMID: 12588151 DOI: 10.1021/ic025971p] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A nickel(II) pentaaza macrocyclic complex containing a 1-hexadecyl pendant chain, [Ni(C(25)H(55)N(5))](ClO(4))(2).H(2)O (1), was synthesized by a one-pot metal-template condensation reaction. Crystal data for 1: triclinic, Ponemacr;, a = 8.333(4) A, b = 8.356(3) A, c = 28.374(9) A, alpha = 81.865(19) degrees, beta = 86.242(18) degrees, gamma = 63.871(17) degrees, Z = 2. Solid 1 forms hydrophobic layers that are constructed by the long alkyl chains of the macrocycles. Solid 1 exchanges ClO(4)(-) with NCS(-), PF(6)(-), C(2)O(4)(2-), NO(3)(-), and CF(3)SO(3)(-) that are dissolved in water. From the reaction of [Ni(C(25)H(55)N(5))Cl(2)] with Et(3)NH(TCNQ)(2) in EtOH/DMF/acetone solution, [Ni(C(25)H(55)N(5))(TCNQ)(2)](TCNQ).(CH(3)COCH(3)) (2) (TCNQ = 7,7,8,8-tetracyano-p-quinodimethane) was prepared. Crystal data for 2: triclinic, Ponemacr;, a = 8.459(0) A, b = 13.945 (1) A, c = 26.833(2) A, alpha = 88.744(2) degrees, beta = 84.536(2) degrees, gamma = 80.089(4) degrees, Z = 2. In 2, TCNQ anions coordinate nickel(II) at the axial sites, which form pi-stacked TCNQ(-) dimers to give rise to 1-D chains. The neutral TCNQ molecules are included between the dimerized TCNQ(-) species, which construct a pi-stacked group of six TCNQ units as blocked by the long alkyl chains. Compound 2 is an electric insulator. It shows a weak signal in the EPR spectrum. The magnetic susceptibility data of 2 measured at 5-300 K exhibit a simple paramagnetism at low temperatures (<100 K) but an increase in the magnetic moment at higher temperatures due to the contribution of a thermally accessible triplet state for the antiferromagnetically coupled [TCNQ](2)(2-).
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Affiliation(s)
- Hye Jin Choi
- School of Chemistry and Molecular Engineering, and the Center for Molecular Catalysis, Seoul National University, Seoul 151-747, Republic of Korea
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35
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Synthesis of BiSrCaCu(Ni)O Ceramics from the Gel Precursors and the Effect of Ni Substitution. B KOREAN CHEM SOC 2002. [DOI: 10.5012/bkcs.2002.23.9.1304] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Munzarová ML, Hoffmann R. Strong electronic consequences of intercalation in cuprate superconductors: the case of a trigonal planar AuI(3) complex stabilized in the Bi(2)Sr(2)CaCu(2)O(y) lattice. J Am Chem Soc 2002; 124:5542-9. [PMID: 11996597 DOI: 10.1021/ja012449d] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Recently, a molecular AuI(3) complex was stabilized in the interlayer space of the Bi(2)Sr(2)CaCu(2)O(y) (Bi2212) high-T(c) superconducting phase, adopting an exceptional D(3)(h) structure (Choy, J.-H.; et al. J. Phys.Chem. B 2000, 104, 7273). If the gold were formally Au(III), a strong Jahn-Teller distortion to T- and Y-shaped structures would be expected. In this work, we try to understand the structural preferences of AuI(3) in both the gas phase and the Bi2212 lattice, as well as the influence of the AuI(3) intercalation on the superconductor lattice. What we think actually happens is that there is an effective electron transfer from the s-type Bi lone pair to the gold, increasing the formal oxidation state of Bi from +3 to +5 and decreasing that of Au from +3 to +1. A trigonal Au(I) trihalide is just fine. The DFT results confirm in the Bi-rich regions the same kind of electron transfer as encountered on the EHT level of theory, but they reveal additional complexities of the problem. The effect of the Bi to intercalating molecule electron transfer on the cuprate layer may be important, quite apart from this specific example, in tuning superconductivity in the cuprates.
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Affiliation(s)
- Markéta L Munzarová
- Contribution from the Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853-1301, USA
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Portier J, Choy JH, Subramanian M. Inoganic–organic-hybrids as precursors to functional materials. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s1466-6049(01)00103-9] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Choy JH, Kim JY, Chung I. Neutron Diffraction and X-ray Absorption Spectroscopic Analyses for Lithiated Aurivillius-Type Layered Perovskite Oxide, Li2Bi4Ti3O12. J Phys Chem B 2001. [DOI: 10.1021/jp010895h] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jin-Ho Choy
- National Nanohybrid Materials Laboratory, School of Chemistry and Molecular Engineering, College of Natural Sciences, Seoul National University, Seoul 151-747, Korea
| | - Jong-Young Kim
- National Nanohybrid Materials Laboratory, School of Chemistry and Molecular Engineering, College of Natural Sciences, Seoul National University, Seoul 151-747, Korea
| | - In Chung
- National Nanohybrid Materials Laboratory, School of Chemistry and Molecular Engineering, College of Natural Sciences, Seoul National University, Seoul 151-747, Korea
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Choy JH, Kwon SJ, Hwang SJ, Kim YI, Jang ES. Chimie douce route to hetero-structured high-Tc cuprates. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s1466-6049(01)00010-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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40
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Choy JH, Kim YI, Hwang SJ, Muraoka Y, Ohnishi N, Hiraga K, Huong PV. HRTEM and Micro-Raman Studies on Superconducting−Superionic Conducting Nanohybrid, Ag1.17I1.54Bi2Sr2CaCu2Oy. J Phys Chem B 2000. [DOI: 10.1021/jp993096w] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jin-Ho Choy
- National Nanohybrid Materials Laboratory, School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-747, Korea, Institute for Materials Research, Tohoku University, Katahira, Aoba-ku, Sendai 980-77, Japan, and Laboratoire de Physico-Chimie Moléculaire, Université Bordeaux I, 351, Cours de la Libération, 33405 Talence, France
| | - Young-Il Kim
- National Nanohybrid Materials Laboratory, School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-747, Korea, Institute for Materials Research, Tohoku University, Katahira, Aoba-ku, Sendai 980-77, Japan, and Laboratoire de Physico-Chimie Moléculaire, Université Bordeaux I, 351, Cours de la Libération, 33405 Talence, France
| | - Seong-Ju Hwang
- National Nanohybrid Materials Laboratory, School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-747, Korea, Institute for Materials Research, Tohoku University, Katahira, Aoba-ku, Sendai 980-77, Japan, and Laboratoire de Physico-Chimie Moléculaire, Université Bordeaux I, 351, Cours de la Libération, 33405 Talence, France
| | - Yuji Muraoka
- National Nanohybrid Materials Laboratory, School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-747, Korea, Institute for Materials Research, Tohoku University, Katahira, Aoba-ku, Sendai 980-77, Japan, and Laboratoire de Physico-Chimie Moléculaire, Université Bordeaux I, 351, Cours de la Libération, 33405 Talence, France
| | - Naoyuki Ohnishi
- National Nanohybrid Materials Laboratory, School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-747, Korea, Institute for Materials Research, Tohoku University, Katahira, Aoba-ku, Sendai 980-77, Japan, and Laboratoire de Physico-Chimie Moléculaire, Université Bordeaux I, 351, Cours de la Libération, 33405 Talence, France
| | - Kenji Hiraga
- National Nanohybrid Materials Laboratory, School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-747, Korea, Institute for Materials Research, Tohoku University, Katahira, Aoba-ku, Sendai 980-77, Japan, and Laboratoire de Physico-Chimie Moléculaire, Université Bordeaux I, 351, Cours de la Libération, 33405 Talence, France
| | - Pham V. Huong
- National Nanohybrid Materials Laboratory, School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-747, Korea, Institute for Materials Research, Tohoku University, Katahira, Aoba-ku, Sendai 980-77, Japan, and Laboratoire de Physico-Chimie Moléculaire, Université Bordeaux I, 351, Cours de la Libération, 33405 Talence, France
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Abstract
▪ Abstract A new series of superconductors based on layer structured nitrides has been developed. The general compositions of the nitrides are MNX (M = Zr, Hf; X = Cl, Br, I). The β-type polymorph consists of MN double layers sandwiched between close-packed halogen layers, which are characterized as semiconductors with a band gap of 3–4 eV. Electrons can be doped to the nitride layers by intercalation of alkali metals between the layers. Upon the intercalation, the compounds become superconductors with the transition temperatures (Tc s) as high as 13 and 25.5 K for β-ZrNCl and β-HfNCl systems, respectively. The Tc of the electron doped β-HfNCl is higher than that observed in any intermetallic compound and suggests that layered nitrides may exhibit Tc s comparable to those observed in layer structured complex copper oxide superconductors. The layer structured nitrides can be variously modified by the amounts of doping, the types of alkali metals, and the interlayer separation, which can be controlled by co-intercalation of organic molecules with alkali metals. This article dicusses topics including the synthesis and structure of the transition metal nitride halides, intercalation, superconductivity, and band structures.
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Affiliation(s)
- Shoji Yamanaka
- Department of Applied Chemistry, Faculty of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
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Choy JH, Kim YI, Hwang SJ, Huong PV. Trigonal Planar (D3h) AuI3 Complex Stabilized in a Solid Lattice. J Phys Chem B 2000. [DOI: 10.1021/jp000490h] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jin-Ho Choy
- National Nanohybrid Materials Laboratory (NNML), School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-747, Korea
| | - Young-Il Kim
- National Nanohybrid Materials Laboratory (NNML), School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-747, Korea
| | - Seong-Ju Hwang
- National Nanohybrid Materials Laboratory (NNML), School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-747, Korea
| | - Pham V. Huong
- Laboratoire de Physico-Chimie Moléculaire, Université Bordeaux I, 351, Cours de la Libération, Talence 33405, France
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Neve F, Crispini A, Francescangeli O. Structural studies on layered alkylpyridinium iodopalladate networks. Inorg Chem 2000; 39:1187-94. [PMID: 12526409 DOI: 10.1021/ic9906959] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of alkylpyridinium (CnH2n + 1NC5H5, hereafter Cn-Py) iodide salts in aqueous acetonitrile with a preformed palladium iodide precursor afforded two different types of organic-inorganic phases depending on the molar ratio. A 2:1 ratio yielded the phase [Cn-Py]2[PdI4] (3, n = 14, 16), which crystallized in the triclinic crystal system. The X-ray crystal structure of 3, (n = 14), refined in the space group P1 (a = 8.918(3) A, b = 9.894(3) A, c = 29.062(12) A, alpha = 93.51(3) degrees, beta = 94.17(3) degrees, gamma = 115.60(3) degrees, and Z = 2), consists of interdigitated bilayers with a basal spacing of 29.0 A. The aliphatic chains of the cations, which run almost parallel to the stacking direction, are fully stretched between polar planes built on isolated [PdI4]2- anions and cation headgroups. Changing the organic cation to palladium ratio to 1:1 led to a new phase [Cn-Py]2[Pd2I6] (4, n = 14, 16), which crystallizes in the triclinic P1 space group (a = 9.399(4) A, b = 14.264(6) A, c = 29.415(13) A, alpha = 92.11(4) degrees, beta = 90.07(4) degrees, gamma = 104.53(3) degrees, Z = 3 for 4(n = 14); a = 9.417(2) A, b = 14.215(3) A, c = 31.552(6) A, alpha = 87.96(3) degrees, beta = 87.63(3) degrees, gamma = 75.67(3) degrees, Z = 3 for 4(n = 16)). The layered structure is basically of a continuously interdigitated single-layer type, with a bilayer sublattice superimposed. Isolated [Pd2I6]2- anions contribute to the inorganic planes. A high degree of interdigitation and tilting of the aliphatic chains lead to basal spacings of 29.4 and 31.5 A for 4(n = 14) and 4(n = 16), respectively. The [Cn-Py]2[PdI4] and [Cn-Py]2[Pd2I6] phases were characterized by thermal analysis. Mesomorphic behavior was observed only for 3(n = 16), which was confirmed by variable-temperature powder XRD and optical microscopy.
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Affiliation(s)
- F Neve
- Dipartimento di Chimica, Università della Calabria, 87030 Arcavacata di Rende, CS, Italy
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Bardeau JF, Parikh AN, Beers JD, Swanson BI. Phase Behavior of a Structurally Constrained Organic−Inorganic Crystal: Temperature-Dependent Infrared Spectroscopy of Silver n-Dodecanethiolate. J Phys Chem B 1999. [DOI: 10.1021/jp992156v] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Atul N. Parikh
- Bioscience Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Jaime D. Beers
- Bioscience Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Basil I. Swanson
- Bioscience Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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45
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Heterostructured Bi-Based Cuprate High-Tc Superconductors with Unusually Coordinated Metal Halides. J SOLID STATE CHEM 1999. [DOI: 10.1006/jssc.1999.8301] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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46
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Anomalous Thermoelectric Power Behaviors of Iodine Intercalated (Bi,Pb)2Sr2Can−1CunO2n+4+δSuperconductors (n=2 and 3). J SOLID STATE CHEM 1999. [DOI: 10.1006/jssc.1998.8035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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