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Dai S, Zhong J, Yang X, Chen C, Zhou L, Liu X, Sun J, Ye K, Zhang H, Li L, Naumov P, Lu R. Strategies to Diversification of the Mechanical Properties of Organic Crystals. Angew Chem Int Ed Engl 2024; 63:e202320223. [PMID: 38588224 DOI: 10.1002/anie.202320223] [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: 12/30/2023] [Revised: 04/06/2024] [Accepted: 04/08/2024] [Indexed: 04/10/2024]
Abstract
Structurally ordered soft materials that respond to complementary stimuli are susceptible to control over their spatial and temporal morphostructural configurations by intersectional or combined effects such as gating, feedback, shape-memory, or programming. In the absence of general and robust design and prediction strategies for their mechanical properties, at present, combined chemical and crystal engineering approaches could provide useful guidelines to identify effectors that determine both the magnitude and time of their response. Here, we capitalize on the purported ability of soft intermolecular interactions to instigate mechanical compliance by using halogenation to elicit both mechanical and photochemical activity of organic crystals. Starting from (E)-1,4-diphenylbut-2-ene-1,4-dione, whose crystals are brittle and photoinert, we use double and quadruple halogenation to introduce halogen-bonded planes that become interfaces for molecular gliding, rendering the material mechanically and photochemically plastic. Fluorination diversifies the mechanical effects further, and crystals of the tetrafluoro derivative are not only elastic but also motile, displaying the rare photosalient effect.
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Affiliation(s)
- Shuting Dai
- Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130021, P. R. China
| | - Jiangbin Zhong
- Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130021, P. R. China
| | - Xiqiao Yang
- Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130021, P. R. China
| | - Chao Chen
- Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130021, P. R. China
| | - Liping Zhou
- Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130021, P. R. China
| | - Xinyu Liu
- Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130021, P. R. China
| | - Jingbo Sun
- Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130021, P. R. China
| | - Kaiqi Ye
- Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130021, P. R. China
| | - Hongyu Zhang
- Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130021, P. R. China
| | - Liang Li
- Smart Materials Lab, New York University Abu Dhabi PO Box 129188, Abu Dhabi, UAE
- Department of Sciences and Engineering, Sorbonne University Abu Dhabi, PO Box 38044, Abu Dhabi, UAE
| | - Panče Naumov
- Smart Materials Lab, New York University Abu Dhabi PO Box 129188, Abu Dhabi, UAE
- Center for Smart Engineering Materials, New York University Abu Dhabi, PO Box 129188, Abu Dhabi, UAE
- 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
| | - Ran Lu
- Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130021, P. R. China
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Ekka A, Choudhury A, Samanta M, Deshmukh A, Halcovitch NR, Park IH, Medishetty R. Solid-State [2+2] Photoreaction of Isostructural Cd(II) Metal Complexes and Solid-State Fluorescence. Molecules 2024; 29:351. [PMID: 38257264 PMCID: PMC10820883 DOI: 10.3390/molecules29020351] [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: 11/07/2023] [Revised: 12/29/2023] [Accepted: 01/05/2024] [Indexed: 01/24/2024] Open
Abstract
A green method to synthesize cyclobutane derivatives has been developed over the past three decades in the form of solid-state [2+2] photochemical reactions. These solid-state reactions also play a major role in the structural transformation of hybrid materials. In this regard, crystal engineering has played a major role in designing photoreactive molecular systems. Here, we report three novel binuclear Cd(II) complexes with the molecular formula [Cd2(4spy)4L4], where 4spy = 4-styryl pyridine and L = p-toluate (1); 4-fluorobenzoate (2); and 3-fluorobenzoate (3). Although three different benzoates are used, all three complexes are isostructural, as corroborated through SCXRD experiments. Structural analysis also helped in identifying two potential photoreactions. These are both intra- and intermolecular in nature and are driven by the head-to-head (HH) and head-to-tail (HT) alignment of 4spy linkers within these metal complexes. 1H NMR spectroscopy studies showed evidence of a quantitative head-to-head photoreaction in all these three complexes, and SCXRD analysis of the recrystallization of the photoproducts also provided confirmation. TGA studies of these photoreactive complexes showed an increase in the thermal stability of the complexes due to the solid-state photoreaction. Photoluminescence studies of these complexes have been conducted, showing a blue shift in emission spectra across all three cases after the photoreaction.
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Affiliation(s)
- Akansha Ekka
- Department of Chemistry, Indian Institute of Technology Bhilai, Durg 491001, India (A.C.)
| | - Aditya Choudhury
- Department of Chemistry, Indian Institute of Technology Bhilai, Durg 491001, India (A.C.)
| | - Madhumita Samanta
- Department of Chemistry, Indian Institute of Technology Bhilai, Durg 491001, India (A.C.)
| | - Ayushi Deshmukh
- Department of Chemistry, Indian Institute of Technology Bhilai, Durg 491001, India (A.C.)
| | | | - In-Hyeok Park
- Graduate School of Analytical Science and Technology (GRAST), Chungnam National University, Daejeon 34134, Republic of Korea
| | - Raghavender Medishetty
- Department of Chemistry, Indian Institute of Technology Bhilai, Durg 491001, India (A.C.)
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Cook CJ, Li W, Lui BF, Gately TJ, Al-Kaysi RO, Mueller LJ, Bardeen CJ, Beran GJO. A theoretical framework for the design of molecular crystal engines. Chem Sci 2023; 14:937-949. [PMID: 36755715 PMCID: PMC9890974 DOI: 10.1039/d2sc05549j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
Photomechanical molecular crystals have garnered attention for their ability to transform light into mechanical work, but difficulties in characterizing the structural changes and mechanical responses experimentally have hindered the development of practical organic crystal engines. This study proposes a new computational framework for predicting the solid-state crystal-to-crystal photochemical transformations entirely from first principles, and it establishes a photomechanical engine cycle that quantifies the anisotropic mechanical performance resulting from the transformation. The approach relies on crystal structure prediction, solid-state topochemical principles, and high-quality electronic structure methods. After validating the framework on the well-studied [4 + 4] cycloadditions in 9-methyl anthracene and 9-tert-butyl anthracene ester, the experimentally-unknown solid-state transformation of 9-carboxylic acid anthracene is predicted for the first time. The results illustrate how the mechanical work is done by relaxation of the crystal lattice to accommodate the photoproduct, rather than by the photochemistry itself. The large ∼107 J m-3 work densities computed for all three systems highlight the promise of photomechanical crystal engines. This study demonstrates the importance of crystal packing in determining molecular crystal engine performance and provides tools and insights to design improved materials in silico.
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Affiliation(s)
- Cameron J. Cook
- Department of Chemistry, University of California RiversideRiverside CA 92521USA
| | - Wangxiang Li
- Department of Chemistry, University of California Riverside Riverside CA 92521 USA
| | - Brandon F. Lui
- Department of Chemistry, University of California RiversideRiverside CA 92521USA
| | - Thomas J. Gately
- Department of Chemistry, University of California RiversideRiverside CA 92521USA
| | - Rabih O. Al-Kaysi
- College of Science and Health Professions-3124, King Saud Bin Abdulaziz University for Health Sciences, and King Abdullah International Medical Research Center, Ministry of National Guard Health AffairsRiyadh 11426Kingdom of Saudi Arabia
| | - Leonard J. Mueller
- Department of Chemistry, University of California RiversideRiverside CA 92521USA
| | | | - Gregory J. O. Beran
- Department of Chemistry, University of California RiversideRiverside CA 92521USA
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