Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 87, Issue 6, Pages 4449-4454Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.1c02898
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Funding
- SERB, India [EMR/2017/001627]
- UGC
- CSIR, India
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This study discovered that arylazopyrazoles with para-dimethylamine and para-pyrrolidine substitutions display very high or near-quantitative bidirectional isomerization under different light sources, and exhibit reasonable thermal stability and impressive stability to reduction.
para-Dimethylamine- and para-pyrrolidine-substituted arylazopyrazoles display very high to near-quantitative or quantitative bidirectional isomerization under violet and green or red lights in both polar (DMSO and DMSO/aqueous buffer, pH 7.5) and nonpolar solvents. These switches confer a reasonable thermal stability to their cis-states (t(1/2) approximate to 4-7 h in DMSO and DMSO/buffer) and also show a high level of resistance to photobleaching and an impressive stability to reduction by glutathione. Using DFT calculations, attempts have been made to decipher the photophysical properties and thermal stabilities of the cis isomers.
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