Cody, John; Fahrni, Christoph J. published the artcile< Fluorescence sensing based on cation-induced conformational switching: copper-selective modulation of the photoinduced intramolecular charge transfer of a donor-acceptor biphenyl fluorophore>, Recommanded Product: 4-Bromo-3-formylbenzonitrile, the main research area is fluorescence sensing cation induced conformational switching copper selective modulation; photoinduced intramol charge transfer donor acceptor biphenyl fluorophore.
The fluorescence emission energy of donor-acceptor substituted biphenyls is highly sensitive towards conformational changes of the interannular twist angle. By integrating 4-dimethylamino-4′-cyano-biphenyl into the ligand backbone of a thioether-rich metal receptor we designed a fluorescence sensor that exhibits high selectivity towards copper. Upon metal binding the ligand undergoes a significant conformational change, which induces a strong hypsochromic shift of the photoinduced charge-transfer emission. Steady-state absorption and fluorescence spectroscopy revealed a high affinity towards Cu(I) with a well-defined 1:1 metal-ligand complex stoichiometry. The nature of the conformational changes upon Cu(I) coordination were analyzed in detail by 1H NMR and 2D NOESY experiments The spectroscopic data provide a coherent picture, which is consistent with a Boltzmann ground-state distribution of several rotamers that are locked into a more flattened geometry upon coordination of Cu(I).
Tetrahedron published new progress about Fluorescence spectroscopy. 89003-95-2 belongs to class bromides-buliding-blocks, and the molecular formula is C8H4BrNO, Recommanded Product: 4-Bromo-3-formylbenzonitrile.
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary