Supercoiled fibres of self-sorted donor-acceptor stacks: a turn-off/turn-on platform for sensing volatile aromatic compounds was written by Sandeep, Anjamkudy;Praveen, Vakayil K.;Kartha, Kalathil K.;Karunakaran, Venugopal;Ajayaghosh, Ayyappanpillai. And the article was included in Chemical Science in 2016.Recommanded Product: 628-13-7 This article mentions the following:
To ensure the comfortable survival of living organisms, detection of different life threatening volatile organic compounds (VOCs) such as biol. metabolites and carcinogenic mols. is of prime importance. Herein, we report the use of supercoiled supramol. polymeric fibers of self-sorted donor-acceptor mols. as “turn-off/turn-on” fluorescent sensors for the detection of carcinogenic VOCs. For this purpose, a C3-sym. donor mol. based on oligo(p-phenylenevinylene), C3OPV, and a perylene bisimide based acceptor mol., C3PBI, have been synthesized. When these two mols. were mixed together in toluene, in contrast to the usual charge transfer (CT) stacking, supramol. fibers of self-sorted stacks were formed at the mol. level, primarily driven by their distinct self-assembly pathways. However, CT interaction at the macroscopic level allows these fibers to bundle together to form supercoiled ropes. An interfacial photoinduced electron transfer (PET) process from the donor to the acceptor fibers leads to an initial fluorescence quenching, which could be modulated by exposure to strong donor or acceptor type VOCs to regenerate the resp. fluorescence of the individual mol. stacks. Thus, strong donors could regenerate the green fluorescence of C3OPV stacks and strong acceptors could reactivate the red fluorescence of C3PBI stacks. These supercoiled supramol. ropes of self-sorted donor-acceptor stacks provide a simple tool for the detection of donor- or acceptor-type VOCs of biol. relevance, using a “turn-off/turn-on” fluorescence mechanism as demonstrated with o-toluidine, which has been reported as a lung cancer marker. In the experiment, the researchers used many compounds, for example, Pyridinehydrochloride (cas: 628-13-7Recommanded Product: 628-13-7).
Pyridinehydrochloride (cas: 628-13-7) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.Recommanded Product: 628-13-7