1D helical ZnII metal–organic polymers: Syntheses,structures and fluorescent properties |
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| Affiliation: | 1. Department of Chemistry, Jadavpur University, Kolkata -700 032, West Bengal, India;2. Department of Chemistry, Jalpaiguri Government Engineering College, Jalpaiguri -735 102, West Bengal, India;3. Università’ Degli Studi di Parma, Dipartimento di Chimica, Parco Area Delle Scienze 17/A, I-43123 PARMA, Italy;4. Department of Chemistry Education, Chungbuk National University, Cheongju 361-763, Republic of Korea;1. School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China;2. Department of Physics, Nanchang University, Nanchang 330031, China;1. Department of Chemistry, Liaoning Province Silicon Materials Engineering Technology Research Centre, Bohai University, Jinzhou 121013, PR China;2. Research Group of Functional Materials for New Energy, School of Chemical Engineering, University of Science and Technology Liaoning, Qianshan Middle Road 185, 114051 Anshan, PR China;1. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore, Singapore;2. Department of Zoology, Banaras Hindu University, Varanasi, India;3. Department of Physics, Banaras Hindu University, Varanasi, India;4. CSIR-National Physical Laboratory, New Delhi, India;1. Department of Chemistry, Shah Jalal University of Science and Technology, Sylhet, Bangladesh;2. Department of Arts and Science, Osaka Kyoiku University, Kashiwara, Osaka, Japan |
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| Abstract: | Hydrothermal reactions of 1,1′-(1,5-pentanediyl)bis-1H-benzimidazole (pbbm) with ZnCl2 afford two 1D helical metal–organic polymers {ZnCl2(pbbm)] · (H2O)1/8}n (1) and {Zn(pbbm)2] · Cl2 · (H2O)1/2}n (2). Polymer 1 features a 1D single helical architecture, whereas 2 possesses a 1D cationic double helical chain framework. Photoluminescence investigations reveal that both of them display strong emissions in the solid state at room temperature, which could originate from a ligand-to-ligand charge-transfer (LLCT) transition, as confirmed by the molecular orbital (MO) calculations. |
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