Pyridinophanes as Two-Centre Phase-Transfer Catalyst for N-Alkylation Reaction
作者:Perumal Rajakumar、Manickam Dhanasekaran
DOI:10.1055/s-2006-926304
日期:——
The syntheticutility of water-soluble pyridinophanes 1 and 2 as an efficient two-centre phase-transfercatalyst for N-alkylation of indoles, imidazole, benzimidazole and benzotriazole has been explored. Application of such pyridinophanes for the synthesis of various precyclophanes involving bis-N alkylation is also described.
Benzotriazolophanes—New Class of Novel Cyclophanes
作者:Perumal Rajakumar、Venghatraghavan Murali
DOI:10.1016/s0040-4020(00)00717-1
日期:2000.9
benzotriazole with 4,4″-bis(bromomethyl)-1,1′:3′,1″-terphenyl in two steps gave the unprecedented benzotriazolophane 4a. By similar alkylation procedure, cyclophanes 4b, 4c and 4d were obtained from the substituted dibromides 6b, 6c and 6d, respectively. Novel cross-linked benzotriazolophane 5 was obtained by using the tetrabromide 9 as the spacer unit.
Luminescent hybrid metal-organic coordination polymers based on Cu/Ag-bis(benzotriazole) units and polyoxometalates
作者:Meng Sun、Wen-Zhe Zhou、Yong-Hui Wang、Hua-Qiao Tan、Yan-Fei Qi、Hong-Ying Zang、Yang-Guang Li
DOI:10.1080/00958972.2016.1146258
日期:2016.7.2
Abstract The reaction of polyoxometalate (NH4)6[Mo7O24], transition-metal ions (Cu2+ or Ag+), and a bridging ligand (bbtx) in the hydrothermal environment led to two hybrid coordinationpolymers, [Cu(bbtx)3][Mo6O19] (1) and [Ag2(bbtx)2][Mo6O19] (2). Luminescent measurements suggest that 1 mainly exhibits luminescent emission of bbtx, but 2 displays strong emission bands ascribed to the ligand-to-metal
摘要 多金属氧酸盐 (NH4)6[Mo7O24]、过渡金属离子(Cu2+ 或 Ag+)和桥配体 (bbtx) 在水热环境中的反应产生了两种杂化配位聚合物,[Cu(bbtx)3][Mo6O19 ] (1) 和 [Ag2(bbtx)2][Mo6O19] (2)。发光测量表明,1 主要表现出 bbtx 的发光发射,但 2 显示出归因于配体到金属电荷转移的强发射带。化合物 2 还显示出 300 K–77 K–300 K 的可逆热致变色发光。由于 Ag 的还原,将 [Mo6O19]2− 引入 Ag-bbtx 网络可导致 2 在 300 W Xe 光照射下的发光猝灭(I) 转化为 Ag(0) 并破坏 2 的 Ag-N 键。通过粉末 X 射线衍射和 X 射线光电子能谱研究了相关机制,
Structural Diversity and Catalytic Properties in a Family of Ag(I)-Benzotriazole Based Coordination Compounds
作者:Edward Loukopoulos、Alaa Abdul-Sada、Eddy M. E. Viseux、Ioannis N. Lykakis、George E. Kostakis
DOI:10.1021/acs.cgd.8b00960
日期:2018.9.5
their variety coordination abilities. Interestingly, certain structures exhibit an isomerism effect (L1T-L3T) in the benzotriazole unit when in solid state; a series of studies are indicative of the 1,1-form which is generally dominant in solution even in cases where the crystal structure does not contain this tautomer. The homogeneous catalytic efficacy of all compounds against the well-known multicomponent
在这项工作中,我们研究了一系列基于半刚性苯并三唑的配体(L 1 –L 3)的配位化学,以及低配位数但用途广泛的Ag I离子。这导致了九种新的配位化合物[Ag(L 1)(CF 3 CO 2)](1),[Ag 2(L 1T)2(CF 3 SO 3)2 ]·2Me 2 CO(2), [Ag(L 2T)(ClO 4)(Me 2 CO)](3),[Ag(L 2T)(BF4)(Et 2 O)](4),[Ag 2(L 3T)2(ClO 4)2 ] 2(5),[Ag(L 3)(NO 3)](6),[Ag 2( L 3T)2(CF 3 CO 2)2 ](7),[Ag 2(L 3T)(CF 3 SO 3)2 ](8)和[Ag 2(L 3T)2(CF 3 CF 2 CO 2)2 ]·2Me 2 CO(9)。这些化合物显示出结构的多样性,包括二聚体(5,7,9)和一维(1D)(3,4,6)和二维(2D)(1,2,
Exploring the Coordination Capabilities of a Family of Flexible Benzotriazole-Based Ligands Using Cobalt(II) Sources
作者:Edward Loukopoulos、Nicholas F. Chilton、Alaa Abdul-Sada、George E. Kostakis
DOI:10.1021/acs.cgd.7b00200
日期:2017.5.3
(2, 7, 10), and two-dimensional (4, 6) coordination polymers. A temperature-induced single-crystal-to-single-crystal transformation of compound 3–4 is additionally reported. The magnetic properties of representative compounds (4, 7, 9) are subject to large changes with only minor structural variations, suggesting that tetrahedral Co(II) nodes in coordination polymers or metal–organic frameworks could