97067-84-0Relevant academic research and scientific papers
Dynamic control of full-colored emission and quenching of photoresponsive conjugated polymers by photostimuli
Watanabe, Kazuyoshi,Hayasaka, Hiroyuki,Miyashita, Tatsuaki,Ueda, Kenta,Akagi, Kazuo
, p. 2794 - 2806 (2015/05/27)
A series of photoresponsive and full-colored fluorescent conjugated copolymers is synthesized by combining phenylene- and thienylene-based main chains with photochromic dithienylethene (DE) side chains. Solutions and cast films of the polymers exhibit var
NMR-based molecular ruler for determining the depth of intercalants within the lipid bilayer. Part I. Discovering the guidelines
Cohen, Yael,Bodner, Efrat,Richman, Michal,Afri, Michal,Frimer, Aryeh A.
experimental part, p. 98 - 113 (2009/12/31)
The development of "molecular rulers" would allow one to quantitatively locate intercalants within the liposomal bilayer. To this end, we have attempted to correlate the 13C NMR chemical shift of a polarizable "reporter" carbon (e.g., carbonyl) of the intercalant-with the ET(30) polarity it experiences, and with its Angstrom distance from the interface. This requires families of molecules with the same two "reporter carbons" separated by a fixed distance, residing at various depths/polarities within the bilayer. The families studied included 4,4-dialkylcyclohexa-2,5-dienones 1, benzenediacetic esters 15, benzenedipropionic esters 17, 4-alkoxybenzaldehydes 19 and methyl 4-alkoxybenzoates 22. These compounds possessed the following characteristics: (1) a planar backbone; (2) polar/hydrophilic "head" groups; (3) modular hydrophobic tails; (4) large changes in the 13C NMR chemical shift (Δδ) of the reporter atoms with solvent polarity. These studies revealed a fifth requirement, namely: (5) the reporter carbons must not be strongly conjugated, lest it reflect the charge build-up at another site within the conjugated system.
