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Qin Z, Gu Y, Young D, Hu F, Luo Z. Stereoselective Solid-State Synthesis of Biologically Active Cyclobutane and Dicyclobutane Isomers via Conformation Blocking and Transference. Molecules 2024; 29:2909. [PMID: 38930974 PMCID: PMC11206361 DOI: 10.3390/molecules29122909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 05/29/2024] [Accepted: 06/05/2024] [Indexed: 06/28/2024] Open
Abstract
Conformations in the solid state are typically fixed during crystallization. Transference of "frozen" C=C conformations in 3,5-bis((E)-2-(pyridin-4-yl)vinyl)methylbenzene (CH3-3,5-bpeb) by photodimerization selectively yielded cyclobutane and dicyclobutane isomers, one of which (Isomer 2) exhibited excellent in vitro anti-cancer activity towards T-24, 7402, MGC803, HepG-2, and HeLa cells.
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Affiliation(s)
- Zhen Qin
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Minzu University, Nanning 530006, China
- College of Intelligent Metallurgy, Guangxi Modern Polytechnic College, Hechi 473000, China
| | - Yunqiong Gu
- School of Environment and Life Science, Nanning Normal University, Nanning 530001, China
| | - Davidjames Young
- Glasgow College UESTC, University of Electronic Science and Technology of China, Chengdu 611731, China;
| | - Feilong Hu
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Minzu University, Nanning 530006, China
| | - Zhirong Luo
- Guangxi Key Laboratory of Urban Water Environment, College of Chemistry & Environment Engineering, Baise University, Baise 533000, China
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2
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Abe H, Kishimura H, Uruichi M. A phase variety of fluorinated ionic liquids: Molecular conformational and crystal polymorph. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 286:121948. [PMID: 36252301 DOI: 10.1016/j.saa.2022.121948] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 09/26/2022] [Accepted: 10/03/2022] [Indexed: 06/16/2023]
Abstract
Crystal polymorphs of fluorinated ionic liquids (fILs) were examined at low-temperature (LT) by Raman spectroscopy. The fILs were 1-alkyl-3-methylimidazolium perfluorobutanesulfonate, [Cnmim][PFBS] (n = 4, 6, and 8). The cations and anion possess conformational degrees of freedom. Various LT phases were derived from the conformational polymorphs of the cations and the anion. Conformational flexibility depended on alkyl chain length. The crystal polymorphs in the fILs were sensitive to molecular conformations and flexibility.
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Affiliation(s)
- Hiroshi Abe
- Department of Materials Science and Engineering, National Defense Academy, Yokosuka 239-8686, Japan
| | - Hiroaki Kishimura
- Department of Materials Science and Engineering, National Defense Academy, Yokosuka 239-8686, Japan
| | - Mikio Uruichi
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
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3
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Gonzalez-Nelson A, Mula S, Šimėnas M, Balčiu Nas S, Altenhof AR, Vojvodin CS, Canossa S, Banys JR, Schurko RW, Coudert FX, van der Veen MA. Emergence of Coupled Rotor Dynamics in Metal-Organic Frameworks via Tuned Steric Interactions. J Am Chem Soc 2021; 143:12053-12062. [PMID: 34324323 PMCID: PMC8361432 DOI: 10.1021/jacs.1c03630] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
The organic components
in metal–organic frameworks (MOFs)
are unique: they are embedded in a crystalline lattice, yet, as they
are separated from each other by tunable free space, a large variety
of dynamic behavior can emerge. These rotational dynamics of the organic
linkers are especially important due to their influence over properties
such as gas adsorption and kinetics of guest release. To fully exploit
linker rotation, such as in the form of molecular machines, it is
necessary to engineer correlated linker dynamics to achieve their
cooperative functional motion. Here, we show that for MIL-53, a topology
with closely spaced rotors, the phenylene functionalization allows
researchers to tune the rotors’ steric environment, shifting
linker rotation from completely static to rapid motions at frequencies
above 100 MHz. For steric interactions that start to inhibit independent
rotor motion, we identify for the first time the emergence of coupled
rotation modes in linker dynamics. These findings pave the way for
function-specific engineering of gear-like cooperative motion in MOFs.
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Affiliation(s)
- Adrian Gonzalez-Nelson
- Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands.,DPI, P.O.Box 92, 5600 AX Eindhoven, The Netherlands
| | - Srinidhi Mula
- Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands
| | - Mantas Šimėnas
- Faculty of Physics, Vilnius University, LT-10222 Vilnius, Lithuania
| | | | - Adam R Altenhof
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States.,National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Cameron S Vojvodin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States.,National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Stefano Canossa
- EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Ju Ras Banys
- Faculty of Physics, Vilnius University, LT-10222 Vilnius, Lithuania
| | - Robert W Schurko
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States.,National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - François-Xavier Coudert
- Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France
| | - Monique A van der Veen
- Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands
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4
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Toward an Understanding of the Formation and Desolvation of Methanol Solvate, and Structure of Methanolysis Product: A Case Study of Nicosulfuron. CRYSTALS 2020. [DOI: 10.3390/cryst10030157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Nicosulfuron (NS) is a widely used sulfonylurea herbicide because of its high selectivity, broad spectrum of herbicide activity, and excellent performance. In this work, nicosulfuron methanol solvate (NS-MeOH) and [[3-[(Dimethylamino)carbonyl]-2-pyridinyl]sulfonyl]carbamic acid methyl ester (PCM) as a product of methanolysis of NS were obtained. Both of their structures were determined by a single crystal X-ray diffraction. A broad range of analytical techniques was applied to characterize the NS-MeOH, such as Powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and hot stage microscopy (HSM). Combined with the analysis of the Independent gradient model (IGM), Atom-in-molecules (AIM), and Hirshfeld surface (HS), direct insights into the role of solvent played in the formation of NS-MeOH and the mechanism of solid-to-solid phase transformation of NS-MeOH could be obtained. In addition, the aqueous solubility of NS was improved through the formation of NS-MeOH. A systematic investigation of herbicidal activity of NS and PCM was carried out. It was found that NS and NS-MeOH had similar herbicidal activities at the experimental concentrations while PCM exhibited significantly lower activity. It was suggested that methanolysis of the sulfonylurea bridge in the NS molecule exerted a great influence on the herbicidal activity.
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5
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Yu S, Wang Z, Liu S, Zhang H, Duan H. Molecular motion and dielectric relaxation in chloroplumbate hybrid crystal. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.06.058] [Citation(s) in RCA: 1] [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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6
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Li NY, Liu D, Lang JP. Regioselective Photochemical Cycloaddition Reactions of Diolefinic Ligands in Coordination Polymers. Chem Asian J 2019; 14:3635-3641. [PMID: 31207177 DOI: 10.1002/asia.201900646] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 06/14/2019] [Indexed: 01/26/2023]
Abstract
The pure diolefinic ligand 1,4-bis(pyridin-4-yl)-1,3-butadiene (bpbde) is photostable in the crystalline state. With the assistance of coordination-driven metal-organic assemblies, the photoreactivity of this diolefinic ligand can be significantly enhanced. A hydrothermal reaction of bpbde with Cd(NO3 )2 ⋅4 H2 O and the auxiliary ligand adipic acid resulted in the formation of a two-dimensional photoreactive coordination polymer (CP), [Cd(adipate)(bpbde)]n (1). When the aliphatic carboxylic acid was replaced by pimelic acid, another photoreactive CP [Cd(pimelate)(bpbde)]n (2) with a three-dimensional framework was obtained. With irradiation of 365 nm UV light, the bpbde ligands in crystalline 1 and 2 underwent a regioselective photochemical [2+2] cycloaddition reaction and converted to 3,4,7,8-tetra(pyridin-4-yl)tricyclo[4.2.0.02,5 ]octane (tptco) and 1,3-bis(pyridin-4-yl)-2,4-bis(2-(pyridin-4-yl)vinyl)cyclobutane (bpbpvcb), respectively. The results provide an interesting insight into the rational design of highly regio- or stereoselective photocatalytic reactions for the formation of special organic molecules.
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Affiliation(s)
- Ni-Ya Li
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 RenAi Road, Suzhou, 215123, Jiangsu, P. R. China.,College of Chemistry and Materials Science, Huaibei Normal University, 100 DongShan Road, Huaibei, 235000, Anhui, P. R. China
| | - Dong Liu
- College of Chemistry and Materials Science, Huaibei Normal University, 100 DongShan Road, Huaibei, 235000, Anhui, P. R. China
| | - Jian-Ping Lang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 RenAi Road, Suzhou, 215123, Jiangsu, P. R. China
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7
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PEEDIKAKKAL ABDULMALIKP. Solid-state Photochemical [2+2] Cycloaddition Reaction of Hydrogen-Bonded Zn(II) Metal Complex Containing Several Parallel C=C Bonds. J CHEM SCI 2017. [DOI: 10.1007/s12039-016-1218-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Chen JM, Hou YX, Zhou QK, Zhang H, Liu D. Regiospecific [2+2] photocycloadditions of an unsymmetrical olefin in the solid state based on metal-mediated assemblies. CrystEngComm 2017. [DOI: 10.1039/c7ce00573c] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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9
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Huang YG, Shiota Y, Su SQ, Wu SQ, Yao ZS, Li GL, Kanegawa S, Kang S, Kamachi T, Yoshizawa K, Ariga K, Sato O. Thermally Induced Intra-Carboxyl Proton Shuttle in a Molecular Rack-and-Pinion Cascade Achieving Macroscopic Crystal Deformation. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607886] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- You-Gui Huang
- Institute for Materials Chemistry and Engineering; Kyushu University; 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
- World Premier International (WPI) Center for Materials Nanoarchitectonics (MANA); Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering; Kyushu University; 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Sheng-Qun Su
- Institute for Materials Chemistry and Engineering; Kyushu University; 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Shu-Qi Wu
- Institute for Materials Chemistry and Engineering; Kyushu University; 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Zi-Shuo Yao
- Institute for Materials Chemistry and Engineering; Kyushu University; 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Guo-Ling Li
- Institute for Materials Chemistry and Engineering; Kyushu University; 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Shinji Kanegawa
- Institute for Materials Chemistry and Engineering; Kyushu University; 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Soonchul Kang
- Institute for Materials Chemistry and Engineering; Kyushu University; 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Takashi Kamachi
- Institute for Materials Chemistry and Engineering; Kyushu University; 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering; Kyushu University; 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Katsuhiko Ariga
- World Premier International (WPI) Center for Materials Nanoarchitectonics (MANA); Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Osamu Sato
- Institute for Materials Chemistry and Engineering; Kyushu University; 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
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10
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Huang Y, Shiota Y, Su S, Wu S, Yao Z, Li G, Kanegawa S, Kang S, Kamachi T, Yoshizawa K, Ariga K, Sato O. Thermally Induced Intra‐Carboxyl Proton Shuttle in a Molecular Rack‐and‐Pinion Cascade Achieving Macroscopic Crystal Deformation. Angew Chem Int Ed Engl 2016; 55:14628-14632. [DOI: 10.1002/anie.201607886] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 09/19/2016] [Indexed: 11/08/2022]
Affiliation(s)
- You‐Gui Huang
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
- World Premier International (WPI) Center for Materials Nanoarchitectonics (MANA) Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Sheng‐Qun Su
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Shu‐Qi Wu
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Zi‐Shuo Yao
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Guo‐Ling Li
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Shinji Kanegawa
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Soonchul Kang
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Takashi Kamachi
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Katsuhiko Ariga
- World Premier International (WPI) Center for Materials Nanoarchitectonics (MANA) Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Osamu Sato
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
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11
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Assembling an alkyl rotor to access abrupt and reversible crystalline deformation of a cobalt(II) complex. Nat Commun 2015; 6:8810. [PMID: 26531811 PMCID: PMC4667628 DOI: 10.1038/ncomms9810] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 10/06/2015] [Indexed: 11/13/2022] Open
Abstract
Harnessing molecular motion to reversibly control macroscopic properties, such as shape and size, is a fascinating and challenging subject in materials science. Here we design a crystalline cobalt(II) complex with an n-butyl group on its ligands, which exhibits a reversible crystal deformation at a structural phase transition temperature. In the low-temperature phase, the molecular motion of the n-butyl group freezes. On heating, the n-butyl group rotates ca. 100° around the C–C bond resulting in 6–7% expansion of the crystal size along the molecular packing direction. Importantly, crystal deformation is repeatedly observed without breaking the single-crystal state even though the shape change is considerable. Detailed structural analysis allows us to elucidate the underlying mechanism of this deformation. This work may mark a step towards converting the alkyl rotation to the macroscopic deformation in crystalline solids. Molecular motion can potentially be harnessed to control macroscopic properties such as size and shape. Here, the authors show that the phase transition of a cobalt(II) complex with an n-butyl group on its ligands, results in a reversible crystal deformation at the structural phase transition temperature.
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12
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Harada J, Ohtani M, Takahashi Y, Inabe T. Molecular motion, dielectric response, and phase transition of charge-transfer crystals: acquired dynamic and dielectric properties of polar molecules in crystals. J Am Chem Soc 2015; 137:4477-86. [PMID: 25781627 DOI: 10.1021/jacs.5b00412] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Molecules in crystals often suffer from severe limitations on their dynamic processes, especially on those involving large structural changes. Crystalline compounds, therefore, usually fail to realize their potential as dielectric materials even when they have large dipole moments. To enable polar molecules to undergo dynamic processes and to provide their crystals with dielectric properties, weakly bound charge-transfer (CT) complex crystals have been exploited as a molecular architecture where the constituent polar molecules have some freedom of dynamic processes, which contribute to the dielectric properties of the crystals. Several CT crystals of polar tetrabromophthalic anhydride (TBPA) molecules were prepared using TBPA as an electron acceptor and aromatic hydrocarbons, such as coronene and perylene, as electron donors. The crystal structures and dielectric properties of the CT crystals as well as the single-component crystal of TBPA were investigated at various temperatures. Molecular reorientation of TBPA molecules did not occur in the single-component crystal, and the crystal did not show a dielectric response due to orientational polarization. We have found that the CT crystal formation provides a simple and versatile method to develop molecular dielectrics, revealing that the molecular dynamics of the TBPA molecules and the dielectric property of their crystals were greatly changed in CT crystals. The TBPA molecules underwent rapid in-plane reorientations in their CT crystals, which exhibited marked dielectric responses arising from the molecular motion. An order-disorder phase transition was observed for one of the CT crystals, which resulted in an abrupt change in the dielectric constant at the transition temperature.
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Affiliation(s)
- Jun Harada
- †Department of Chemistry, Faculty of Science, and ‡Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Masaki Ohtani
- †Department of Chemistry, Faculty of Science, and ‡Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Yukihiro Takahashi
- †Department of Chemistry, Faculty of Science, and ‡Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Tamotsu Inabe
- †Department of Chemistry, Faculty of Science, and ‡Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
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13
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Vande Velde CML, Zeller M, Azov VA. Thermodynamic parameters of the pedal motion in the crystal structures of two bromomethylated azobenzenes. CrystEngComm 2015. [DOI: 10.1039/c5ce00905g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Differences in the thermodynamic parameters of the central N-atoms' pedal motion in two bromomethylated azobenzenes were determined by multi-temperature X-ray diffraction, and rationalized by packing studies.
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Affiliation(s)
| | - Matthias Zeller
- Youngstown State University
- One University Plaza
- Youngstown, USA
| | - Vladimir A. Azov
- University of Bremen
- Department of Chemistry
- D-28359 Bremen, Germany
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14
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Zhang X, Shao XD, Li SC, Cai Y, Yao YF, Xiong RG, Zhang W. Dynamics of a caged imidazolium cation–toward understanding the order-disorder phase transition and the switchable dielectric constant. Chem Commun (Camb) 2015; 51:4568-71. [DOI: 10.1039/c4cc08693g] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A molecular compass-like behaviour is found in a perovskite-type cage compound (HIm)2[KCo(CN)6], leading to the switchable and anisotropic dielectric constants.
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Affiliation(s)
- Xi Zhang
- Department of Physics & Shanghai Key Laboratory of Magnetic Resonance
- East China Normal University
- Shanghai 200062
- China
| | - Xiu-Dan Shao
- Ordered Matter Science Research Center
- Southeast University
- Nanjing 211189
- China
| | - Si-Chao Li
- Ordered Matter Science Research Center
- Southeast University
- Nanjing 211189
- China
| | - Ying Cai
- Ordered Matter Science Research Center
- Southeast University
- Nanjing 211189
- China
| | - Ye-Feng Yao
- Department of Physics & Shanghai Key Laboratory of Magnetic Resonance
- East China Normal University
- Shanghai 200062
- China
| | - Ren-Gen Xiong
- Ordered Matter Science Research Center
- Southeast University
- Nanjing 211189
- China
| | - Wen Zhang
- Ordered Matter Science Research Center
- Southeast University
- Nanjing 211189
- China
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15
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Molecular motor-driven abrupt anisotropic shape change in a single crystal of a Ni complex. Nat Chem 2014; 6:1079-83. [PMID: 25411886 DOI: 10.1038/nchem.2092] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 09/19/2014] [Indexed: 11/08/2022]
Abstract
Many molecular machines with controllable molecular-scale motors have been developed. However, transmitting molecular movement to the macroscopic scale remains a formidable challenge. Here we report a single crystal of a Ni complex whose shape changes abruptly and reversibly in response to thermal changes at around room temperature. Variable-temperature single-crystal X-ray diffraction studies show that the crystalline shape change is induced by an unusual 90° rotation of uniaxially aligned oxalate molecules. The oxalate dianions behave as molecular-scale rotors, with their movement propagated through the entire crystalline material via intermolecular hydrogen bonding. Consequently, the subnanometre-scale changes in the oxalate molecules are instantly amplified to a micrometre-scale contraction or expansion of the crystal, accompanied by a thermal hysteresis loop. The shape change in the crystal was clearly detected under an optical microscope. The large directional deformation and prompt response suggest a role for this material in microscale or nanoscale thermal actuators.
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16
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Aitipamula S, Chow PS, Tan RBH. Polymorphism in cocrystals: a review and assessment of its significance. CrystEngComm 2014. [DOI: 10.1039/c3ce42008f] [Citation(s) in RCA: 212] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Liu D, Lang JP. Regiospecific photodimerization reactions of an unsymmetrical alkene in two coordination compounds. CrystEngComm 2014. [DOI: 10.1039/c3ce41609g] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Lusi M, Barbour LJ. Temperature-dependent guest reorientation: a reversible order–disorder transformation in a single crystal. CrystEngComm 2014. [DOI: 10.1039/c3ce41572d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Li S, Chen JM, Lu TB. Synthon polymorphs of 1 : 1 co-crystal of 5-fluorouracil and 4-hydroxybenzoic acid: their relative stability and solvent polarity dependence of grinding outcomes. CrystEngComm 2014. [DOI: 10.1039/c4ce00221k] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two synthon polymorphs of 1 : 1 co-crystals of 5-fluorouracil and 4-hydroxybenzoic acid were synthesized, and the crystal structures were determined.
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Affiliation(s)
- Song Li
- School of Pharmaceutical Sciences
- Sun Yat-Sen University
- Guangzhou 510006, China
- School of Life Sciences
- Sun Yat-Sen University
| | - Jia-Mei Chen
- School of Pharmaceutical Sciences
- Sun Yat-Sen University
- Guangzhou 510006, China
| | - Tong-Bu Lu
- School of Pharmaceutical Sciences
- Sun Yat-Sen University
- Guangzhou 510006, China
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
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20
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Lusi M, Bernstein J. On the propulsion mechanism of “jumping” crystals. Chem Commun (Camb) 2013; 49:9293-5. [DOI: 10.1039/c3cc45646c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Eddleston MD, Sivachelvam S, Jones W. Screening for polymorphs of cocrystals: a case study. CrystEngComm 2013. [DOI: 10.1039/c2ce26496j] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chuang CJ, Lai CC, Liu YH, Peng SM, Chiu SH. A Two-Stage Molecular Retractable Cable Featuring Push-Button and Rotary Two-Way Switching Modes. Chemistry 2012; 18:16698-707. [DOI: 10.1002/chem.201202820] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 09/25/2012] [Indexed: 11/06/2022]
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Horie M, Suzaki Y, Hashizume D, Abe T, Wu T, Sassa T, Hosokai T, Osakada K. Thermally-induced phase transition of pseudorotaxane crystals: changes in conformation and interaction of the molecules and optical properties of the crystals. J Am Chem Soc 2012; 134:17932-44. [PMID: 23039308 DOI: 10.1021/ja304406c] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This paper presents a pseudorotaxane that acts as a thermally driven molecular switch in the single-crystal state. Crystals of the cationic pseudorotaxane consisting of dibenzo[24]crown-8 (DB24C8) and N-(xylylammonium)-methylferrocene as the cyclic and axle component molecules, respectively, undergo crystalline-phase transition at 128 °C with heating and 116 °C with cooling, according to differential-scanning-calorimetry measurements. X-ray crystallographic analyses revealed that the phase transition was accompanied by rotation of the 4-methylphenyl group of the axle component molecule and a simultaneous shift in the position of the PF(6)(-) counteranion. Crystalline phase transition changes the conformation and position of the DB24C8 molecule relative to the ammonium cation partially; the interaction between the cyclic component and the PF(6)(-) anion in the crystal changes to a greater extent. Moreover, there are changes in the vibration angle (θ) and birefringence (Δn) on the (001) face of the crystal transitionally; θ is rotated by +12°, and Δn is decreased from 0.070 to 0.059 upon heating across the phase transition temperature. The phase transition and accompanying change in the optical properties of the crystal occur reversibly and repeatedly upon heating and cooling processes. The switching rotation of the aromatic plane of the molecule induces a change in the optical anisotropy of the crystal, which is regarded as a demonstration of a new type of optical crystal. Partial replacement of the PF(6)(-) anion with the bulkier AsF(6)(-) anion forms crystals with similar crystallographic parameters. An increase in the AsF(6)(-) content decreases the reversible-phase-transition temperature gradually down to 99 °C (T(end)) and 68 °C (T(exo)) ([AsF(6)(-)]:[PF(6)(-)] = 0.4:0.6).
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Affiliation(s)
- Masaki Horie
- Department of Chemical Engineering, Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan.
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Vogelsberg CS, Garcia-Garibay MA. Crystalline molecular machines: function, phase order, dimensionality, and composition. Chem Soc Rev 2011; 41:1892-910. [PMID: 22012174 DOI: 10.1039/c1cs15197e] [Citation(s) in RCA: 271] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The design of molecular machines is stimulated by the possibility of developing new materials with complex physicochemical and mechanical properties that are responsive to external stimuli. Condensed-phase matter with anisotropic molecular order and controlled dynamics, also defined as amphidynamic crystals, offers a promising platform for the design of bulk materials capable of performing such functions. Recent studies have shown that it is possible to engineer molecular crystals and extended solids with Brownian rotation about specific axes that can be interfaced with external fields, which may ultimately be used to design novel optoelectronic materials. Structure/function relationships of amphidynamic materials have been characterized, establishing the blueprints to further engineer sophisticated function. However, the synthesis of amphidynamic molecular machines composed of multiple "parts" is essential to realize increasingly complex behavior. Recent progress in amphidynamic multicomponent systems suggests that sophisticated functions similar to those of simple biomolecular machines may eventually be within reach.
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Affiliation(s)
- Cortnie S Vogelsberg
- Department of Chemistry, University of California Los Angeles, Los Angeles, California, USA
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25
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Commins P, Nuñez JE, Garcia-Garibay MA. Synthesis of Bridged Molecular Gyroscopes with Closed Topologies: Triple One-Pot Macrocyclization. J Org Chem 2011; 76:8355-63. [DOI: 10.1021/jo201513y] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Patrick Commins
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Jose E. Nuñez
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Miguel A. Garcia-Garibay
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
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26
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Bracco S, Comotti A, Ferretti L, Sozzani P. Supramolecular Aggregation of Block Copolymers in the Solid State As Assisted by the Selective Formation of Inclusion Crystals. J Am Chem Soc 2011; 133:8982-94. [DOI: 10.1021/ja201551n] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Silvia Bracco
- Department of Materials Science, University of Milano Bicocca, Via R. Cozzi 53, 20125 Milano, Italy
| | - Angiolina Comotti
- Department of Materials Science, University of Milano Bicocca, Via R. Cozzi 53, 20125 Milano, Italy
| | - Lisa Ferretti
- Department of Materials Science, University of Milano Bicocca, Via R. Cozzi 53, 20125 Milano, Italy
| | - Piero Sozzani
- Department of Materials Science, University of Milano Bicocca, Via R. Cozzi 53, 20125 Milano, Italy
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Sharma MK, Bharadwaj PK. A Dynamic Open Framework Exhibiting Guest- and/or Temperature-Induced Bicycle-Pedal Motion in Single-Crystal to Single-Crystal Transformation. Inorg Chem 2011; 50:1889-97. [DOI: 10.1021/ic102305v] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Manish K. Sharma
- Department of Chemistry, Indian Institute of Technology Kanpur, 208016, India
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28
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Schultheiss* N, Roe M, Boerrigter SXM. Cocrystals of nutraceuticalp-coumaric acid with caffeine and theophylline: polymorphism and solid-state stability explored in detail using their crystal graphs. CrystEngComm 2011. [DOI: 10.1039/c0ce00214c] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Yen ML, Chen NC, Lai CC, Liu YH, Peng SM, Chiu SH. Controlling the rotation of a complexed guest within a molecular cage. Dalton Trans 2011; 40:2163-6. [DOI: 10.1039/c0dt00375a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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O’Brien ZJ, Karlen SD, Khan S, Garcia-Garibay MA. Solid-State Molecular Rotors with Perdeuterated Stators: Mechanistic Insights from Biphenylene Rotational Dynamics in Ordered and Disordered Crystal Forms. J Org Chem 2010; 75:2482-91. [DOI: 10.1021/jo9025176] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zachary J. O’Brien
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569
| | - Steven D. Karlen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569
| | - Saeed Khan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569
| | - Miguel A. Garcia-Garibay
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569
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31
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Poplaukhin P, Tiekink ERT. Interwoven coordination polymers sustained by tautomeric forms of the bridging ligand. CrystEngComm 2010. [DOI: 10.1039/b916585a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Aitipamula S, Chow PS, Tan RBH. Conformational and enantiotropic polymorphism of a 1 : 1 cocrystal involving ethenzamide and ethylmalonic acid. CrystEngComm 2010. [DOI: 10.1039/c004491a] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Rodriguez-Molina B, Ochoa ME, Farfán N, Santillan R, García-Garibay MA. Synthesis, Characterization, and Rotational Dynamics of Crystalline Molecular Compasses with N-Heterocyclic Rotators. J Org Chem 2009; 74:8554-65. [DOI: 10.1021/jo901261j] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Braulio Rodriguez-Molina
- Departamento de Química, Centro de Investigación y Estudios Avanzados del IPN, México D.F. 07360, México
- Chemistry and Biochemistry Department, University of California, Los Angeles, California 90095
| | - Ma. Eugenia Ochoa
- Departamento de Química, Centro de Investigación y Estudios Avanzados del IPN, México D.F. 07360, México
| | - Norberto Farfán
- Facultad de Química, Departamento de Química Orgánica, Universidad Nacional Autónoma de México, México D.F. 04510, México
| | - Rosa Santillan
- Departamento de Química, Centro de Investigación y Estudios Avanzados del IPN, México D.F. 07360, México
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Cai YP, Zhou XX, Zhou ZY, Zhu SZ, Thallapally PK, Liu J. Single-Crystal-to-Single-Crystal Transformation in a One-Dimensional Ag−Eu Helical System. Inorg Chem 2009; 48:6341-3. [DOI: 10.1021/ic9007125] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yue-Peng Cai
- School of Chemistry and Environment, Key Lab of Technology on Electrochemical Energy Storage and Power Generation, South China Normal University, Guangzhou 510006, China
| | - Xiu-Xia Zhou
- School of Chemistry and Environment, Key Lab of Technology on Electrochemical Energy Storage and Power Generation, South China Normal University, Guangzhou 510006, China
| | - Zheng-Yuan Zhou
- School of Chemistry and Environment, Key Lab of Technology on Electrochemical Energy Storage and Power Generation, South China Normal University, Guangzhou 510006, China
| | - Shi-Zheng Zhu
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Praveen K. Thallapally
- Pacific Northwest National Laboratory, Energy and Environment Directorate, 902 Battelle Boulevard, Richland, Washington 99352
| | - Jun Liu
- Pacific Northwest National Laboratory, Energy and Environment Directorate, 902 Battelle Boulevard, Richland, Washington 99352
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Chierotti MR, Gobetto R. Solid‐State NMR Investigation of Ligand Mobility and Reactivity in Transition Metal Complexes. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200801205] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Michele R. Chierotti
- Dipartimento di Chimica I.F.M., Università di Torino, via P. Giuria 7, 10125 Torino, Italy, Fax: +39‐011‐6707855
| | - Roberto Gobetto
- Dipartimento di Chimica I.F.M., Università di Torino, via P. Giuria 7, 10125 Torino, Italy, Fax: +39‐011‐6707855
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Molecular recognition and self-assembly special feature: Encapsulated-guest rotation in a self-assembled heterocapsule directed toward a supramolecular gyroscope. Proc Natl Acad Sci U S A 2009; 106:10444-8. [PMID: 19416810 DOI: 10.1073/pnas.0812660106] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The self-assembled heterocapsule 1.2, which is formed by the hydrogen bonds of tetra(4-pyridyl)-cavitand 1 and tetrakis(4-hydroxyphenyl)-cavitand 2, encapsulates 1 molecule of guests such as 1,4-diacetoxybenzene 3a, 1,4-diacetoxy-2,5-dimethylbenzene 3b, 1,4-diacetoxy-2,5-dialkoxybenzenes (3c, OCH(3); 3d, OC(2)H(5); 3e, OC(3)H(7); 3f, OC(4)H(9); 3g, OC(5)H(11); 3h, OC(6)H(13); 3i, OC(8)H(17)), 1,4-diacetoxy-2,5-difluorobenzene 4a, and 1,4-diacetoxy-2,3-difluorobenzene 4b. The X-ray crystallographic analysis of 3c@(1.2) showed that the acetoxy groups at the 1,4-positions of 3c are oriented toward the 2 aromatic cavity ends of 1.2 and that 3c can rotate along the long axis of 1.2. Thus, the 1.2 (stator) with the encapsulation guest (rotator) behaves as a supramolecular gyroscope. A variable temperature (VT) (1)H NMR study in CDCl(3) showed that 3a, 3b, 4a, and 4b within 1.2 rotate rapidly even at 218 K, whereas guest rotation is almost inhibited for 3h and 3i even at 323 K. In this respect, 4b with a large dipole moment is a good candidate for the rotator of 1.2. For 3c-3g, the enthalpic (DeltaH(double dagger)) and entropic (DeltaS(double dagger)) contributions to the free energy of activation (DeltaG(double dagger)) for the guest-rotational steric barriers within 1.2 were obtained from Eyring plots based on line-shape analysis of the VT (1)H NMR spectra. The value of DeltaG(double dagger) increased in the order 3c < 3d < 3e < 3f < 3g. Thus, the elongation of the alkoxy chains at the 2,5-positions of 3 puts the brakes on guest rotation within 1.2.
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Polaske NW, Nichol GS, Szabó LZ, Olenyuk B. Molecular Solids from Symmetrical Bis(piperazine-2,5-diones) with Open and Closed Monomer Conformations. CRYSTAL GROWTH & DESIGN 2009; 9:2191-2197. [PMID: 20161254 PMCID: PMC2699313 DOI: 10.1021/cg800902u] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The design, synthesis and solid state structures of a new class of xylylene-linked bis(1,4- piperazine-2,5-diones) are reported in an effort to extend the molecular framework of piperazine-2,5-diones. These compounds were derived from piperazine-2,5-dione as the core structure, synthesized via a new efficient route, and their crystal structures were determined. We examined the effects of side chain substitution on conformations of the linked bis-DKPs. Crystallization of 3,3'-[1,4-phenylenebis(methylene)]-bis[6-(hydroxymethyl)-1,4-dimethylpiperazine-2,5-dione] yielded molecular solids with an unusual network of "C"-shaped monomers held together by four intermolecular hydrogen bonds per asymmetric unit. Similarly, intermolecular interactions between the iodomethyl groups in 3,3'-[1,4-phenylenebis(methylene)]-bis[6-(iodomethyl)-1,4-dimethyl-piperazine-2,5-dione] result in the monomers adopting a "C"-shape in the solid state. Assembly of the monomers with side chains converted to methyl groups or tert-butyldimethylsilyl ethers, thereby lacking these stabilizing intermolecular interactions, results in an infinite array of "S"-shaped conformations. These results suggest that the interplay between the attractive intermolecular interactions and repulsive steric interactions of the substituents at the C6 and C6' positions of the diketopiperazine rings is important in determining the solid-state conformations of xylylene-linked bis(piperazine-2,5-diones).
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Alesi S, Brancolini G, Viola I, Capobianco ML, Venturini A, Camaioni N, Gigli G, Melucci M, Barbarella G. Self-organization, optical, and electrical properties of alpha-quinquethiophene-dinucleotide conjugates. Chemistry 2009; 15:1876-85. [PMID: 19132701 DOI: 10.1002/chem.200801684] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The synthesis and properties of (5')TA(3')-t5 (8a) and (5')CG(3')-t5 (8b) conjugates, in which the self-complementary dinucleotides TA and CG are covalently bound to the central ring of alpha-quinquethiophene (t5), are described. According to molecular mechanics calculations, the preferred conformation of both 8a and 8b is that with the dinucleotide folded over the planar t5 backbone, with the nucleobases facing t5 at stacking distance. The calculations show that the aggregation process of 8a and 8b is driven by a mix of nucleobase-thiophene interactions, hydrogen bonding between nucleobases (non Watson-Crick (W&C) in TA, and W&C in CG), van der Waals, and electrostatic interactions. While 8b is scarcely soluble in any solvents, 8a is soluble in water, indicating that the aggregates of the former are more stable than those of the latter. Microfluidic-induced self-assembly studies of 8a showed the formation of lamellar, spherulitic, and dendritic supramolecular structures, depending on the concentration and solvent evaporation time. The self-assembled structures displayed micrometer dimensions in the xy plane of the substrate and nanometer dimensions in the z direction. Spatially resolved confocal microscopy and spectroscopy showed that the aggregates were characterized by intense fluorescence emission. Cast films of 8a from water solutions showed chirality transfer from the dinucleotide to t5. The hole mobility of the cast films of 8a was estimated using a two-electrode device under high vacuum and found to be up to two orders of magnitude greater than those previously measured for dinucleotide-quarterthiophene conjugates under the same experimental conditions.
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Affiliation(s)
- Silvia Alesi
- Consiglio Nazionale Ricerche, Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR), Via P. Gobetti 101, 40129 Bologna, Italy
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39
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Gould SL, Rodriguez RB, Garcia-Garibay MA. Synthesis and solid-state dynamics of molecular dirotors. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.05.143] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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