Mononuclear, trinuclear, and hetero-trinuclear supramolecular complexes containing a new tri-sulfonate ligand and cobalt(II)/copper(II)-(1,10-phenanthroline)2 building blocks
摘要:
Novel mononuclear, trinuclear, and hetero-trinuclear supermolecular complexes, [Co(phen)(2)(H2O)(HTST)] center dot 2H(2)O (1), [CO3(phen)(6) (H2O)(2)(TST)(2)]center dot 7H(2)O (2), and [CO2Cu(phen)(6)(H2O)(2)(TST)(2)]center dot 10H(2)O (3), have been synthesized by the reactions of a new tri-sulfonate ligand (2,4,6-tris(4-sulfophenylamino)- 1,3,5-triazine, H3TST) with the M2+ (M = Co, Cu) and the second ligand 1, 10-phenanthroline (phen). Complex 1 contains a cis-Co(II)(phen)(2) building block and an HTST as monodentate ligand; complex 2 consists of two TST as bidentate ligands connecting one trans- and two cis-Co(II)(phen)(2) building blocks; complex 3 is formed by replacing the transCo(II)(phen)(2) in 2 with a trans-Cu(II)(phen)(2), which is the first reported hetero-trinuclear supramolecular complex containing both the Co(II)(phen)(2) and Cu(II)(phen)(2) as building blocks. The study shows the flexible multifunctional self-assembly capability of the H3TST ligands presenting in these supramolecular complexes through coordinative, H-bonding and even pi-pi stacking interactions. The photo luminescent optical properties of these complexes are also investigated and discussed as well as the second-order nonlinear optical properties of 1. (C) 2007 Elsevier Inc. All rights reserved.
Facile fabrication of three-dimensional highly ordered structural polyaniline–graphene bulk hybrid materials for high performance supercapacitor electrodes
摘要:
提出了一种新方法,用于构建三维(3D)高度有序的聚苯胺–石墨烯块状混合材料,以作为高性能超级电容器电极,采用了一个功能性分子——磺化三嗪(ST),并通过氢键和π–π堆叠相互作用在石墨烯片上吸附。添加ST的目的是为了提高石墨烯纳米片在水中的分散性,并随后通过静电相互作用诱导聚苯胺(PANI)的非均匀成核。因此,PANI纳米棒在单个磺化三嗪功能化石墨烯纳米片(STGNS)的两个表面上垂直生长,采用的是在水溶液中对苯胺进行原位化学氧化聚合。利用UV–vis、FTIR、拉曼光谱和XRD的结合详细研究了控制良好的PANI纳米棒阵列–磺化三嗪功能化石墨烯纳米片(PANI–STGNS)混合材料的形成机理。优化后的PANI–STGNS10块状混合材料在1 A g⁻¹时具有高达1225 F g⁻¹的比电容,同时展现出卓越的倍率能力和循环稳定性,这些特性对于在高性能超级电容器电极中的应用至关重要。