1
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Yu C, Jiang X, Al-Handawi MB, Naumov P, Li L, Yu Q, Wang G. Bending, Twisting, and Propulsion of Photoreactive Crystals by Controlled Gas Release. Angew Chem Int Ed Engl 2024; 63:e202403397. [PMID: 38530916 DOI: 10.1002/anie.202403397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 03/26/2024] [Accepted: 03/26/2024] [Indexed: 03/28/2024]
Abstract
The rapid release of gas by a chemical reaction to generate momentum is one of the most fundamental ways to elicit motion that could be used to sustain and control the motility of objects. We report that hollow crystals of a three-dimensional supramolecular metal complex that releases gas by photolysis can propel themselves or other objects and advance in space when suspended in mother solution. In needle-like regular crystals, the reaction occurs mainly on the surface and results in the formation of cracks that evolve due to internal pressure; the expansion on the cracked surface of the crystal results in bending, twisting, or coiling of the crystal. In hollow crystals, gas accumulates inside their cavities and emanates preferentially from the recess at the crystal terminus, propelling the crystals to undergo directional photomechanical motion through the mother solution. The motility of the object which can be controlled externally to perform work delineates the concept of "crystal microbots", realized by photoreactive organic crystals capable of prolonged directional motion for actuation or delivery. Within the prospects, we envisage the development of a plethora of light-weight, efficient, autonomously operating robots based on organic crystals with high work capacity where motion over large distances can be attained due to the large volume of latent gas generated from a small volume of the crystalline solid.
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Affiliation(s)
- Chunjiao Yu
- College of Chemistry and Chemical Engineering, Qingdao University, Shandong, 266071, China
| | - Xiaofan Jiang
- College of Chemistry and Chemical Engineering, Qingdao University, Shandong, 266071, China
| | - Marieh B Al-Handawi
- Smart Materials Lab, New York University Abu Dhabi, PO Box, 129188, Abu Dhabi, United Arab Emirates
| | - Panče Naumov
- Smart Materials Lab, New York University Abu Dhabi, PO Box, 129188, Abu Dhabi, United Arab Emirates
- Center for Smart Engineering Materials, New York University Abu Dhabi, PO Box, 129188, Abu Dhabi, United Arab Emirates
- Research Center for Environment and Materials, Macedonian Academy of Sciences and Arts, Bul. Krste Misirkov 2, MK-1000, Skopje, Macedonia
- Molecular Design Institute, Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003, USA
| | - Liang Li
- Smart Materials Lab, New York University Abu Dhabi, PO Box, 129188, Abu Dhabi, United Arab Emirates
- Department of Sciences and Engineering, Sorbonne University Abu Dhabi, PO Box, 38044, Abu Dhabi, United Arab Emirates
| | - Qi Yu
- College of Chemistry and Chemical Engineering, Qingdao University, Shandong, 266071, China
| | - Guoming Wang
- College of Chemistry and Chemical Engineering, Qingdao University, Shandong, 266071, China
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2
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Wei Y, Chen K, Zhu S, Wu W, Zhao H, Huang X, Wang N, Zhou L, Wang T, Wang J, Hao H. Photoactuators Based on Plastically Flexible α-Cyanostilbene Molecular Crystals Driven by the Solid-State [2+2] Cycloaddition Reaction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2307756. [PMID: 37987091 DOI: 10.1002/smll.202307756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/26/2023] [Indexed: 11/22/2023]
Abstract
Organic photomechanical molecular crystals are promising candidates for photoactuators, which have potential applications as smart materials in various fields. However, it is still challenging to fabricate photomechanical molecular crystals with flexibility because most of the molecular crystals are brittle and the mechanism of flexible crystals remains controversial. Here, a plastically flexible α-cyanostilbene crystal has been synthesized that can undergo solid-state [2+2] cycloaddition reaction under violet or UV irradiation and exhibits excellent photomechanical bending properties. A hook-shaped crystal can lift 0.7 mg object upward by 1.5 cm, which proves its potential for application as photoactuators. When complex with the agarose polymer, the molecules will be in the form of macroscopic crystals, which can drive the composite films to exhibit excellent photomechanical bending performance. Upon irradiation with UV light, the composite film can quickly lift 18.0 mg object upward by 0.3 cm. The results of this work may facilitate the application of macroscale crystals as photoactuators.
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Affiliation(s)
- Yiwei Wei
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China
| | - Kui Chen
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China
| | - Shanshan Zhu
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China
| | - Wenbo Wu
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China
| | - Hongtu Zhao
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China
| | - Xin Huang
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China
| | - Na Wang
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China
| | - Lina Zhou
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China
| | - Ting Wang
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China
| | - Jingkang Wang
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China
| | - Hongxun Hao
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China
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3
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Yang YH, Chen YS, Chuang WT, Yang JS. Bifurcated Polymorphic Transition and Thermochromic Fluorescence of a Molecular Crystal Involving Three-Dimensional Supramolecular Gear Rotation. J Am Chem Soc 2024; 146:8131-8141. [PMID: 38471139 PMCID: PMC10979455 DOI: 10.1021/jacs.3c12454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 01/25/2024] [Accepted: 02/21/2024] [Indexed: 03/14/2024]
Abstract
The ability of molecules to move and rearrange in the solid state accounts for the polymorphic transition and stimuli-responsive properties of molecular crystals. However, how the crystal structure determines the molecular motion ability remains poorly understood. Here, we report that a three-dimensional (3D) supramolecular gear network in the green-emissive polymorph 1G of a dialkylamino-substituted anthracene-pentiptycene π-system (1) enables an unusual bifurcated polymorphic transition into a yellow-emissive polymorph (1Y) and a new green-emissive polymorph (1G*) via 3D correlated supramolecular rotation. The 90° forward correlated rotation causes the molecular conformation between the octyl and the anthracene units to change from syn to anti, the ladder-like supramolecular columns to constrict, and the gear network to disengage. This cooperative molecular motion is marked by the gradual formation of an intermediate state (1I) across the entire crystal from 170 to 230 °C, which then undergoes bifurcated (forward or backward rotation) and irreversible transitions to form polymorphs 1Y and 1G* at 230-235 °C. Notably, 1G* is similar to 1G but lacks gear engagement, preventing its transformation into 1Y. Nevertheless, 1G can be restored by grinding 1Y or 1G* or fuming with dichloromethane (DCM) vapor. This work illustrates the correlation between the crystal structure and solid-state molecular motion behavior and demonstrates how a 3D molecular gear system efficiently transmits thermal energy to drive the polymorphic transition and induce fluorochromism through significant conformational and packing changes.
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Affiliation(s)
- Yun-Hsuan Yang
- Department
of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Yu-Shan Chen
- Department
of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Wei-Tsung Chuang
- National
Synchrotron Radiation Research Center, Hsinchu 30092, Taiwan
| | - Jye-Shane Yang
- Department
of Chemistry, National Taiwan University, Taipei 10617, Taiwan
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4
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Giri P, Panda A, Panda MK. Photoinduced Puffing with Large Volume Expansion and Photomechanical Motions induced by Topochemical [4+4] Reactions in Molecular Crystal Solvates. Chemistry 2024; 30:e202303836. [PMID: 38198243 DOI: 10.1002/chem.202303836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 01/07/2024] [Accepted: 01/10/2024] [Indexed: 01/12/2024]
Abstract
In this work, we report the first example of two crystal solvates of an anthracene-benzhydrazide based molecule (Ant) that display very distinct photo-responsive behaviour when 365 or 405 nm or visible light is illuminated. For the first time, the crystal hydrate that has water molecule in the lattice (hereafter named as Ant-H2O) display fascinating puffing behavior with large volume expansion upto 50 % accompanied with surface modulation when illuminated with 405 nm light, a phenomenon very much similar to the rice or popcorn puffing by thermal treatment. Utilizing the properties of photoconverted Ant-H2O crystals, we have demonstrated their application in photoinduced enhanced liquid absorption using various liquids/solutions. The other crystal solvate having DMF in the crystal lattice (hereafter named as Ant-DMF) responds to 405 nm light by bending, twisting, chopping, jumping or splitting etc. The chopping of Ant-DMF crystal was also observed under ambient/white light but at a slower rate compared to 405 nm light. Single crystal X-ray diffraction study reveals that the photoinduced puffing and photomechanical effects of these materials are rooted to the topochemical [4+4] cycloaddition reaction between the anthracene moieties that facilitate molecular packing change assisted by the reconfiguration of intermolecular non-covalent interactions involving lattice trapped solvent molecules.
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Affiliation(s)
- Prasenjit Giri
- Department of Chemistry, Jadavpur University, Kolkata, 700032
| | - Atanu Panda
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, 305-0044, Ibaraki, Japan
- Current affiliation: Amity University, Amity Institute of Applied Science, Sector-125, Noida, 201313, Uttar Pradesh, India
| | - Manas K Panda
- Department of Chemistry, Jadavpur University, Kolkata, 700032
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5
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Hasebe S, Hagiwara Y, Ueno T, Asahi T, Koshima H. Negative to positive axial thermal expansion switching of an organic crystal: contribution to multistep photoactuation. Chem Sci 2024; 15:1088-1097. [PMID: 38239690 PMCID: PMC10793602 DOI: 10.1039/d3sc04796b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 12/10/2023] [Indexed: 01/22/2024] Open
Abstract
Materials displaying negative thermal expansion (NTE), in contrast to typical materials with positive thermal expansion (PTE), are attractive for both fundamental research and practical applications, including the development of composites with near-zero thermal expansion. A recent data mining study revealed that approximately 34% of organic crystals may present NTE, indicating that NTE in organic crystals is much more common than generally believed. However, organic crystals that switch from NTE to PTE or vice versa have rarely been reported. Here, we report the crystal of N-3,5-di-tert-butylsalicylide-3-nitroaniline in the enol form (enol-1) as the first organic crystal in which the axial thermal expansion changes from negative to positive at around room temperature. When heated, the crystal shrinks along the a-axis below 30 °C and then it expands above 30 °C. Geometric calculations revealed that below 30 °C, the decrease in the tilt angle of the molecule exceeds the increase in the interplanar distance, causing NTE, whereas above 30 °C, the increase in the interplanar distance outweighs the decrease in the tilt angle, resulting in PTE. By combining photoisomerisation and the NTE-PTE switching induced by the photothermal effect, multistep crystal photoactuation was achieved. Moreover, actuation switching of the same crystal sample by changing atmosphere temperature was realised by utilising the NTE-PTE change. Such NTE-PTE switching without a thermal phase transition provides not only new insight into organic crystals but also a new strategy for designing crystal actuators.
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Affiliation(s)
- Shodai Hasebe
- Graduate School of Advanced Science and Engineering, Waseda University 3-4-1 Okubo, Shinjuku-ku Tokyo 169-8555 Japan
| | - Yuki Hagiwara
- Graduate School of Advanced Science and Engineering, Waseda University 3-4-1 Okubo, Shinjuku-ku Tokyo 169-8555 Japan
| | - Takashi Ueno
- Department of Nanoscience and Nanoengineering, Graduate School of Advanced Science and Engineering, Waseda University 3-4-1 Okubo, Shinjuku-ku Tokyo 169-8555 Japan
| | - Toru Asahi
- Graduate School of Advanced Science and Engineering, Waseda University 3-4-1 Okubo, Shinjuku-ku Tokyo 169-8555 Japan
- Department of Nanoscience and Nanoengineering, Graduate School of Advanced Science and Engineering, Waseda University 3-4-1 Okubo, Shinjuku-ku Tokyo 169-8555 Japan
- Research Organization for Nano & Life Innovation, Waseda University 513, Waseda Tsurumakicho Shinjuku-ku Tokyo 162-0041 Japan
| | - Hideko Koshima
- Research Organization for Nano & Life Innovation, Waseda University 513, Waseda Tsurumakicho Shinjuku-ku Tokyo 162-0041 Japan
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6
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Peng J, Han C, Zhang X, Jia J, Bai J, Zhang Q, Wang Y, Xue P. Mechanical Effects of Elastic Crystals Driven by Natural Sunlight and Force. Angew Chem Int Ed Engl 2023; 62:e202311348. [PMID: 37828622 DOI: 10.1002/anie.202311348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 10/11/2023] [Accepted: 10/12/2023] [Indexed: 10/14/2023]
Abstract
Flexible crystals that can capture solar energy and convert it into mechanical energy are promising for a wide range of applications such as information storage and actuators, but obtaining them remains a challenge. Herein, an elastic crystal of a barbiturate derivative was found to be an excellent candidate, demonstrating plastic bending behavior under natural sunlight irradiation. 1 H NMR and high-resolution mass spectrum data of microcrystals before and after light irradiation demonstrated that light-induced [2+2] cycloaddition was the driving force for the photomechanical effects. Interestingly, the crystals retained elastic bending even after light irradiation. This is the first report of flexible crystals that can be driven by natural sunlight and that have both photomechanical properties and elasticity. Furthermore, regulation of the passive light output direction of the crystals and transport of objects by applying mechanical forces and light was demonstrated.
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Affiliation(s)
- Jiang Peng
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials of, Ministry of Education & School of Chemistry and Materials Science of, Shanxi Normal University, 030032, Taiyuan, China
| | - Chuchu Han
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials of, Ministry of Education & School of Chemistry and Materials Science of, Shanxi Normal University, 030032, Taiyuan, China
| | - Xin Zhang
- Aerospace science & industry defense technology research and test center, 100039, Beijing, China
| | - Junhui Jia
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials of, Ministry of Education & School of Chemistry and Materials Science of, Shanxi Normal University, 030032, Taiyuan, China
| | - Jiakun Bai
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials of, Ministry of Education & School of Chemistry and Materials Science of, Shanxi Normal University, 030032, Taiyuan, China
| | - Qi Zhang
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials of, Ministry of Education & School of Chemistry and Materials Science of, Shanxi Normal University, 030032, Taiyuan, China
| | - Yan Wang
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials of, Ministry of Education & School of Chemistry and Materials Science of, Shanxi Normal University, 030032, Taiyuan, China
| | - Pengchong Xue
- Tianjin key laboratory of structure and performance for functional molecules, College of Chemistry, Tianjin Normal University, 300387, Tianjin, China
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7
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Borchers T, Topić F, Arhangelskis M, Vainauskas J, Titi HM, Bushuyev OS, Barrett CJ, Friščić T. Three-in-One: Dye-Volatile Cocrystals Exhibiting Intensity-Dependent Photochromic, Photomechanical, and Photocarving Response. J Am Chem Soc 2023; 145. [PMID: 37924293 PMCID: PMC10655124 DOI: 10.1021/jacs.3c07060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 10/11/2023] [Accepted: 10/12/2023] [Indexed: 11/06/2023]
Abstract
Cocrystallization of a cis-azobenzene dye with volatile molecules, such as pyrazine and dioxane, leads to materials that exhibit at least three different light-intensity-dependent responses upon irradiation with low-power visible light. The halogen-bond-driven assembly of the dye cis-(p-iodoperfluorophenyl)azobenzene with volatile halogen bond acceptors produces cocrystals whose light-induced behavior varies significantly depending on the intensity of the light applied. Low-intensity (<1 mW·cm-2) light irradiation leads to a color change associated with low levels of cis → trans isomerization. Irradiation at higher intensities (150 mW·mm-2) produces photomechanical bending, caused by more extensive isomerization of the dye. At still higher irradiation intensities (2.25 W·mm-2) the cocrystals undergo cold photocarving; i.e., they can be cut and written on with micrometer precision using laser light without a major thermal effect. Real-time Raman spectroscopy shows that this novel photochemical behavior differs from what would be expected from thermal energy input alone. Overall, this work introduces a rational blueprint, based on supramolecular chemistry in the solid state, for new types of crystalline light-responsive materials, which not only respond to being exposed to light but also change their response based on the light intensity.
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Affiliation(s)
- Tristan
H. Borchers
- Department
of Chemistry, McGill University, Montreal H3A 0B8, Canada
- School
of Chemistry, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Filip Topić
- Department
of Chemistry, McGill University, Montreal H3A 0B8, Canada
| | | | - Jogirdas Vainauskas
- Department
of Chemistry, McGill University, Montreal H3A 0B8, Canada
- School
of Chemistry, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Hatem M. Titi
- Department
of Chemistry, McGill University, Montreal H3A 0B8, Canada
| | | | | | - Tomislav Friščić
- Department
of Chemistry, McGill University, Montreal H3A 0B8, Canada
- School
of Chemistry, University of Birmingham, Birmingham B15 2TT, United Kingdom
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8
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Lin J, Liu S, Zhang J, Grützmacher H, Su CY, Li Z. Room temperature stable E, Z-diphosphenes: their isomerization, coordination, and cycloaddition chemistry. Chem Sci 2023; 14:10944-10952. [PMID: 37829033 PMCID: PMC10566463 DOI: 10.1039/d3sc04506d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 09/09/2023] [Indexed: 10/14/2023] Open
Abstract
E,Z-isomers display distinct physical properties and chemical reactivities. However, investigations on heavy main group elements remain limited. In this work, we present the isolation and X-ray crystallographic characterization of N-heterocyclic vinyl (NHV) substituted diphosphenes as both E- and Z-isomers (L[double bond, length as m-dash]CH-P[double bond, length as m-dash]P-CH[double bond, length as m-dash]L, E,Z-2b; L = N-heterocyclic carbene). E-2b is thermodynamically more stable and undergoes reversible photo-stimulated isomerization to Z-2b. The less stable Z-isomer Z-2b can be thermally reverted to E-2b. Theoretical studies support the view that this E ↔ Z isomerization proceeds via P[double bond, length as m-dash]P bond rotation, reminiscent of the isomerization observed in alkenes. Furthermore, both E,Z-2b coordinate to an AuCl fragment affording the complex [AuCl(η2-Z-2b)] with the diphosphene ligand in Z-conformation, exclusively. In contrast, E,Z-2b undergo [2 + 4] and [2 + 1] cycloadditions with dienes or diazo compounds, respectively, yielding identical cycloaddition products in which the phosphorus bound NHV groups are in trans-position to each other. DFT calculations provide insight into the E/Z-isomerisation and stereoselective formation of Au(i) complexes and cycloaddition products.
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Affiliation(s)
- Jieli Lin
- LIFM, IGCME, School of Chemistry, Sun Yat-Sen University Guangzhou 510006 China
| | - Shihua Liu
- LIFM, IGCME, School of Chemistry, Sun Yat-Sen University Guangzhou 510006 China
| | - Jie Zhang
- LIFM, IGCME, School of Chemistry, Sun Yat-Sen University Guangzhou 510006 China
| | - Hansjörg Grützmacher
- LIFM, IGCME, School of Chemistry, Sun Yat-Sen University Guangzhou 510006 China
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1 Zürich 8093 Switzerland
| | - Cheng-Yong Su
- LIFM, IGCME, School of Chemistry, Sun Yat-Sen University Guangzhou 510006 China
| | - Zhongshu Li
- LIFM, IGCME, School of Chemistry, Sun Yat-Sen University Guangzhou 510006 China
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9
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Wang CH, Lin YC, Bhunia S, Feng Y, Kundu P, Stern CL, Chen PL, Stoddart JF, Horie M. Photosalience and Thermal Phase Transitions of Azobenzene- and Crown Ether-Based Complexes in Polymorphic Crystals. J Am Chem Soc 2023; 145:21378-21386. [PMID: 37733877 DOI: 10.1021/jacs.3c06371] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
Stimuli-responsive molecular crystals have attracted considerable attention as promising smart materials with applications in various fields such as sensing, actuation, and optoelectronics. Understanding the structure-mechanical property relationships, however, remains largely unexplored when it comes to functionalizing these organic crystals. Here, we report three polymorphic crystals (Forms A, B, and C) formed by the non-threaded complexation of a dibenzo[18]crown-6 (DB18C6) ether ring and an azobenzene-based ammonium cation, each exhibiting distinct thermal phase transitions, photoinduced deformations, and mechanical behavior. Structural changes on going from Form A to Form B and from Form C to Form B during heating and cooling, respectively, are observed by single-crystal X-ray crystallography. Form A shows photoinduced reversible bending, whereas Form B exhibits isotropic expansion. Form C displays uniaxial negative expansion with a remarkable increase of 44% in thickness under photoirradiation. Force measurements and nanoindentation reveal that the soft crystals of Form A with a low elastic modulus demonstrate a significant photoresponse, attributed to the non-threaded molecular structure, which permits flexibility of the azobenzene unit. This work represents a significant advance in the understanding of the correlation between structure-thermomechanical and structure-photomechanical properties necessary for the development of multi-stimulus-responsive materials with tailored properties.
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Affiliation(s)
- Chi-Hsien Wang
- Department of Chemical Engineering, National Tsing Hua University, 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - Yi-Chia Lin
- Department of Chemical Engineering, National Tsing Hua University, 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - Surojit Bhunia
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Yuanning Feng
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Pramita Kundu
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Charlotte L Stern
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Pei-Lin Chen
- Instrumentation Center, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - J Fraser Stoddart
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou 311215, China
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - Masaki Horie
- Department of Chemical Engineering, National Tsing Hua University, 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
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10
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Chen Y, Yu C, Zhu X, Yu Q. Photomechanical effects based on a one-dimensional Zn coordination polymer crystal driven by [4 + 4] cycloaddition. Dalton Trans 2023; 52:12194-12197. [PMID: 37606299 DOI: 10.1039/d3dt02088f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Photomechanical crystals are promising candidates for photo actuators due to their ability to convert light energy into mechanical energy. We synthesized a coordination polymer crystal that can undergo [4 + 4] cycloaddition reactions with mechanical motion. The inclusion of {[ZnL2(4,4'-bipy)(CH3OH)2]}∞ in a polymer membrane significantly magnified the actuation behavior.
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Affiliation(s)
- Yanlin Chen
- Shandong Provincial Key Laboratory of Molecular Engineering, College of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Science), Jinan, 250353, People's Republic of China
| | - Chunjiao Yu
- College of Chemistry and Chemical Engineering, Qingdao University, Shandong 266071, People's Republic of China.
| | - Xiaotong Zhu
- College of Chemistry and Chemical Engineering, Qingdao University, Shandong 266071, People's Republic of China.
| | - Qi Yu
- College of Chemistry and Chemical Engineering, Qingdao University, Shandong 266071, People's Republic of China.
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11
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Huang XD, Hong BK, Wen GH, Li SH, Zheng LM. Photo-controllable heterostructured crystals of metal-organic frameworks via reversible photocycloaddition. Chem Sci 2023; 14:1852-1860. [PMID: 36819854 PMCID: PMC9931055 DOI: 10.1039/d2sc06732c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 01/19/2023] [Indexed: 01/21/2023] Open
Abstract
Metal-organic framework (MOF)-based heterostructures are attractive because they can provide versatile platforms for various applications but are limited by complex liquid epitaxial growth methods. Here, we employ photolithography to fabricate and control MOF-based heterostructured crystals via [4 + 4] photocycloaddition. A layered dysprosium-dianthracene framework, [Dy(NO3)3(depma2)1.5]·(depma2)0.5 (2) [depma2 = pre-photodimerized 9-diethylphosphonomethylanthracene (depma)] underwent a single-crystal-to-single-crystal transition at 140 °C to form [Dy(NO3)3(depma)(depma2)]·(depma2)0.5 (3). The dissociated anthracene moieties are face-to-face π-π interacted allowing a reversible photocycloaddition between 2 and 3. This structural transformation causes a luminescence switch between blue and yellow-green and thus can be used to fabricate erasable 2 + 3 heterostructured crystals for rewritable photonic barcodes. The internal strain at the heterostructure interface leads to photobending and straightening of the crystal, a photomechanical response that is fast, reversible and durable, even operating at 140 °C, making it promising for photoactuation. This work may inspire the development of intelligent MOF-based heterostructures for photonic applications.
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Affiliation(s)
- Xin-Da Huang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University Nanjing 210023 China
| | - Ben-Kun Hong
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Ge-Hua Wen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University Nanjing 210023 China
| | - Shu-Hua Li
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Li-Min Zheng
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University Nanjing 210023 China
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Bardají M, Font-Bardia M, Gallen A, Garcia-Cirera B, Ferrer M, Martínez M. Iron complexes of bridging azo ligands in aqueous solution: changes in the thermal switching mechanism on coordination and oxidation state of metal centres. Dalton Trans 2023; 52:1720-1730. [PMID: 36655477 DOI: 10.1039/d2dt03790d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Three azobenzenes CN(C6H4)-NN-(C5H4N) (py-iso), CN(C6H4)-NN-(C6H4)CN (cyano-iso) and CN(C6H4)-NN-(C6H4)NC (iso-iso) with good coordinating groups (pyridine, phenylcyano or phenylisocyano) at the ends of the diazenyl unit have been synthesized and fully characterised. These compounds have been used as ligands in the synthesis of water-soluble metallic species by coordination to {FeII(CN)53-} units, either in one or two of the anchoring groups of the derivatives. Both the azo derivatives and their complexes are photochemically active with respect to their trans-to-cis isomerisation process. Their cis-to-trans reverse thermal reaction has been thoroughly studied as a function of the donor groups, solvent, temperature and pressure, in order to gain insight into the rotation or inversion mechanisms involved in the process. A comparison of the isomerisation mechanism between the iron complexes and the corresponding free ligands revealed an interesting fine tuning of the process on coordination of the {FeII(CN)53-} moieties, which may even produce, in some cases, non-photoswitchable species containing typically photoactive units.
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Affiliation(s)
- Manuel Bardají
- IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
| | - Mercè Font-Bardia
- Unitat de Difracció de RX, Centres Científics i Tecnològics de la Universitat de Barcelona (CCiTUB). Universitat de Barcelona, Solé i Sabarís 1-3, 08028 Barcelona, Spain
| | - Albert Gallen
- Secció de Química Inorgànica, Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.
| | - Beltzane Garcia-Cirera
- Secció de Química Inorgànica, Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.
| | - Montserrat Ferrer
- Secció de Química Inorgànica, Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain. .,Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, 08028 Barcelona, Spain
| | - Manuel Martínez
- Secció de Química Inorgànica, Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain. .,Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, 08028 Barcelona, Spain
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13
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Ge D, Dai Y, Li K. Self-Sustained Euler Buckling of an Optically Responsive Rod with Different Boundary Constraints. Polymers (Basel) 2023; 15:polym15020316. [PMID: 36679197 PMCID: PMC9862129 DOI: 10.3390/polym15020316] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 01/04/2023] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
Self-sustained oscillations can directly absorb energy from the constant environment to maintain its periodic motion by self-regulating. As a classical mechanical instability phenomenon, the Euler compression rod can rapidly release elastic strain energy and undergo large displacement during buckling. In addition, its boundary configuration is usually easy to be modulated. In this paper, we develop a self-sustained Euler buckling system based on optically responsive liquid crystal elastomer (LCE) rod with different boundary constraints. The buckling of LCE rod results from the light-induced expansion and compressive force, and the self-buckling is maintained by the energy competition between the damping dissipation and the net work done by the effective elastic force. Based on the dynamic LCE model, the governing equations for dynamic Euler buckling of the LCE rod is formulated, and the approximate admissible trigonometric functions and Runge-Kutta method are used to solve the dynamic Euler buckling. Under different illumination parameters, there exists two motion modes of the Euler rod: the static mode and the self-buckling mode, including alternating and unilateral self-buckling modes. The triggering conditions, frequency, and amplitude of the self-sustained Euler buckling can be modulated by several system parameters and boundary constraints. Results indicate that strengthening the boundary constraint can increase the frequency and reduce the amplitude. It is anticipated that this system may open new avenues for energy harvesters, signal sensors, mechano-logistic devices, and autonomous robots.
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Affiliation(s)
- Dali Ge
- School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China
- Institute of Advanced Technology, University of Science and Technology of China, Hefei 230001, China
| | - Yuntong Dai
- School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China
| | - Kai Li
- School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China
- Correspondence:
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