English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The fluorescence spectrum of N-(1-anthryl)-2,4,6-trimethylpyridinium cation (1) has an anomalouslyhigh Stokes' shift. The fluorescence spectra of 1 in ethanol and butyronitrile are shifted to shortwavelengthregion and fluorescence quantum yield increases as the temperature decreases. The fluorescencerate constant of this compound changes considerably (6 times in ethanol and 15 times in butyronitrile) asthe temperature decreases from 293 K (relaxed state) to 77 K (mainly nonrelaxed state). It points out that atthese temperatures the fluorescence takes place from two species with different structures. It is concludedthat anomalously high fluorescence Stokes' shift of 1 is caused by both solvent orientation relaxation andexcited state structural relaxation consisting in the mutual rotation of anthracene and pyridinium fragmentsof the cation and resulting in the formation of a specie with different structure. The rates of these processesare determined by the temperature-dependent viscosity of the medium

Excited state structural relaxation relaxation of N-(1-anthryl)-2,4,6-trimethyl-pyridinium cation