Experimental and theoretical studies on a novel helical architecture driven by hydrogen and halogen bonding interactions
作者:QING ZHU LIU、SHAN SHAN WANG、TENG FEI WANG、JIAN GUO LIN、XUE HAI JU、LING QIU
DOI:10.1007/s12039-016-1195-9
日期:2016.12
A novel two-dimensional (2D), layered, helical supramolecular architecture constructed via cooperative hydrogen bond and halogen bonds was synthesized and characterized: [(BMBA)2(TPB)] n (1) [BMBA = 3-bromo-2-methylbenzoic acid, TPB = 1,2,3,4-tetra-(4-pyridyl)-butane]. Density functional theory (DFT) calculations were carried out to investigate the nature of intermolecular interactions between BMBA and TPB. The cooperation between hydrogen bond and halogen bond in building up the open organic architecture was demonstrated elaborately. Complex 1 exhibits strong photoluminescence and high thermal stability. The nature of electronic transitions in the photoluminescent process was investigated by means of time-dependent DFT (TDDFT) calculations and molecular orbital analyses, revealing that the luminescent property of the helical supramolecular architecture of 1 was ligand-based. Periodic DFT calculations show that 1 is an electrical insulator with a band gap of 3.29 eV.
合成并表征了一种通过氢键和卤素键合作构建的新型二维 (2D) 层状螺旋超分子结构: [(BMBA)2(TPB)] n (1) [BMBA = 3-bromo-2-methylBenzic酸,TPB = 1,2,3,4-四-(4-吡啶基)-丁烷]。进行密度泛函理论 (DFT) 计算来研究 BMBA 和 TPB 之间分子间相互作用的性质。详细论证了氢键和卤素键在构建开放有机结构中的配合。配合物1表现出强光致发光和高热稳定性。通过依赖时间的DFT(TDDFT)计算和分子轨道分析研究了光致发光过程中电子跃迁的性质,揭示了1的螺旋超分子结构的发光特性是基于配体的。周期性 DFT 计算表明 1 是带隙为 3.29 eV 的电绝缘体。