41225-63-2Relevant articles and documents
Steric control of directional isomerism in dicopper(I) helicates of asymmetrically substituted 2,2':6',2':2,6'-quaterpyridine derivatives
Constable,Heirtzler,Neuburger,Zehnder
, p. 5606 - 5617 (1997)
Derivatives of 2,2':6',2'':2'',6'''-quaterpyridine have been prepared which are asymmetrically substituted with alkyl groups in the 4- or 6- position and with various substituents in the 4'-position. These ligands form dicopper(I) double helicates which have been investigated by 1H and 13C NMR spectroscopic techniques. The formation of helical isomers is shown to depend on the intramolecular interactions between the constituent helicands of the double helicate; 4'-methyl substituents undergo steric interactions with the 4-substituent of the partner helicand, leading to a modest selectivity, although bulky 4-substituents decrease selectivity. In the absence of 4'-substituents, the smaller pitch permits steric interactions between like 4-substituents of the component helicands. In each case, formation of the head-to-head helicate isomer is preferred.
Sterically congested, hexameric tetrakispyridinyl-PdII/Cd II-metallomacrocycles: Self-assembly and structural characterization
Perera, Sujith,Li, Xiaopeng,Guo, Mingming,Wesdemiotis, Chrys,Moorefield, Charles N.,Newkome, George R.
, p. 4658 - 4660 (2011)
Hexagonal PdII- or CdII-tetrakispyridinyl-based macrocycles are quantitatively self-assembled from 4′-(3-pyridinyl)-4, 4′′-di(tert-butyl)-2,2′:6′,2″-terpyridine and structurally confirmed by NMR and TWIM-MS. The Royal Society of Chemistry 2011.
Self-assembly of giant supramolecular cubes with terpyridine ligands as vertices and metals on edges
Wang, Chao,Hao, Xin-Qi,Wang, Ming,Guo, Cunlan,Xu, Bingqian,Tan, Eric N.,Zhang, Yan-Yan,Yu, Yihua,Li, Zhong-Yu,Yang, Hai-Bo,Song, Mao-Ping,Li, Xiaopeng
, p. 1221 - 1226 (2014/03/21)
Self-assembly of three-dimensional (3-D) architecture using terpyridine (tpy)-based building blocks is challenging and seldom addressed due the fixed geometry (around 180°) of tpy-M(ii)-tpy (M = Ru, Fe, Zn, and Cd) connectivity. Here we describe the self-
Synthesis and photophysical studies of back-to-back dinuclear platinum terpyridine complexes with different substituents on the bridging ligand
Liu, Rui,Li, Zhongjing,Zhu, Hongjun,Sun, Wenfang
scheme or table, p. 383 - 389 (2012/07/14)
Four back-to-back dinuclear platinum terpyridine complexes with different substituents on the bridging ligand (1a-1d) were synthesized and characterized. Their electronic absorption, photoluminescence and triplet transient difference absorption were systematically investigated. All complexes exhibit strong 1MLCT/1ILCT absorption bands in the visible region, which significantly red-shifts when electron-donating substituents are introduced on the conjugated bridge and blue-shifts when electron-withdrawing substituents are present. Excitation of 1a and 1d in solution at their respective low-energy absorption band at room temperature results in an orange and red luminescence, respectively, which can be tentatively attributed to the 1MLCT/ 1ILCT excited state. These complexes exhibit intense broad triplet transient difference absorption in the visible to the near-IR region, which likely arises from the ligand-localized states (3π,π* or 3ILCT). Electron-donating substituent causes a pronounced red-shift, while electron-withdrawing substituents induce a blue-shift of the triplet transient absorption bands.
