189190-29-2Relevant academic research and scientific papers
Unraveling Concomitant Packing Polymorphism in Metallosupramolecular Polymers
Langenstroer, Anja,Kartha, Kalathil K.,Dorca, Yeray,Droste, J?rn,Stepanenko, Vladimir,Albuquerque, Rodrigo Q.,Hansen, Michael Ryan,Sánchez, Luis,Fernández, Gustavo
, p. 5192 - 5200 (2019)
The phenomenon of polymorphism is ubiquitous in biological systems and has also been observed in various types of self-assembled materials in solution and in the solid state. In the field of supramolecular polymers, different kinetic vs thermodynamic self
Carbazole-Based Tetrapodal Anchor Groups for Gold Surfaces: Synthesis and Conductance Properties
O'Driscoll, Luke J.,Wang, Xintai,Jay, Michael,Batsanov, Andrei S.,Sadeghi, Hatef,Lambert, Colin J.,Robinson, Benjamin J.,Bryce, Martin R.
supporting information, p. 882 - 889 (2019/12/24)
As the field of molecular-scale electronics matures and the prospect of devices incorporating molecular wires becomes more feasible, it is necessary to progress from the simple anchor groups used in fundamental conductance studies to more elaborate anchor
Photophysical Properties of Oligo(phenylene ethynylene) Iridium(III) Complexes Functionalized with Metal-Anchoring Groups
Ponce, Julia,Aragó, Juan,Vayá, Ignacio,Magenti, Jorge Gómez,Tatay, Sergio,Ortí, Enrique,Coronado, Eugenio
, p. 1851 - 1859 (2016/05/02)
The electrochemical and photophysical properties of a family of conjugated ligands and their iridium(III) cyclometallated complexes are described. They consist of a series of monocationic IrIII bis-2-phenylpyridine complexes with p-phenylethynyl-1,10-phenanthroline ligands of different length. The structure of these ligands includes terminal acetylthiol or pyridine groups, which can provide good electrical contacts between metal electrodes. Cyclic voltammetry, absorption and emission spectroscopy, laser flash photolysis and density functional theory calculations reveal that the high conjugation of the diimine ligand affords small energy gaps between the frontier orbitals. Nevertheless, the nature of the terminal substituents and the extent of the conjugation in the diimine ligand have little influence on the photophysical features at room temperature. The spectroscopic data and theoretical calculations agree that the charge-transfer nature of the emitting excited state is maintained along the series at room temperature, whereas in rigid matrices ligand-centred states also contribute to the low-temperature emission. The good conducting features of the diimine ligands, the small dependence of the HOMO-LUMO (HOMO = highest occupied molecular orbital, LUMO = lowest unoccupied molecular orbital) gaps of these complexes on the ligands and the charge-transfer nature of the emitting excited state make these complexes promising test beds for the study of photoconducting phenomena in molecular junctions.
Synthesis of dihydroindolizines for potential photoinduced work function alteration
Bartucci, Matthew A.,Wierzbicki, Patrycja M.,Gwengo, Chengeto,Shajan, Sunny,Hussain, Syed H.,Ciszek, Jacob W.
supporting information; experimental part, p. 6839 - 6842 (2011/03/18)
Seeking to immobilize photochromophores on metallic surfaces, we have synthesized four molecules which contain both a photoresponsive dihydroindolizine (DHI) core and a sulfur containing moiety, which allow for their assembly onto gold substrates. Sonogashira, Suzuki, or Ullmann couplings are employed to generate pyridines with pendant thioacetates (or disulfides). The pyridines are condensed with spiro[2-cyclopropene-1, 9′-[9H]fluorene]- 2, 3-dimethyl ester affording the targeted DHIs.
Crystal engineering using very short and linear C(sp)-H···N hydrogen bonds: Formation of head-to-tail straight tapes and their assembly into nonlinear optical polar crystals
Ohkita,Suzuki,Nakatani,Tsuji
, p. 1454 - 1455 (2007/10/03)
The crystallization of 4-ethynylpyridine (1) and 4-(4-ethynylphenyl)ethynylpyridine (2) leads to C(sp)-H···N hydrogen bonded straight tapes that further assemble into polar crystals, in the case of 2, and show intense powder SHG response, 8 times more efficient than crystalline urea.
