Proton transfer triggered proton transfer: a self-assisted twin excited state intramolecular proton transfer

Abstract

The double excited state intramolecular proton transfer (ESIPT) of 3,5-bis(2-hydroxyphenyl)-1H-1,2,4-triazole (bis-HPTA) has been investigated and found to undergo a new type of proton transfer.

Nanoparticle and surfactant controlled switching between proton transfer and charge transfer reaction coordinates

“…Upon decreasing the polarity, the emission spectrum of the tautomer red shifts. [62][63][64][65][66][67][68] The red shift in the tautomer emission also supports the fact that the molecule is present in a relatively less polar environment than in DMF. However, CTAB in the absence of silver has a small effect on the emission spectrum of DHP.…”

Novel Ferrocene‐Appended β‐Ketoimines and Related BF2 Derivatives with Significant Aggregation‐Induced Emission and Second‐Order Nonlinear Optical Properties

“…l max,abs [nm] [a] l max,fl [nm] [a,b] Stokes shift [cm À1 ] [c] F fl (CH 3 CN) [d] AIE F fl (CH 3 CN/H 2 O) [d,e] pected for restricted keto-enamine tautomerism and an increase in rigidity, [60] the quantum yields of the ketoimines were greatly enhanced (10-folde nhancement) upon formation of the boron difluoride complexes (see Ta ble 1). The formation of the BF 2 complex of L1 in CH 3 CN solution was studied by using the Benesi-Hildebrand plot of the fluorescencei ntensitya sa functiono ft he BF 3 •OEt 2 concentration (Figure 5).…”

Investigation of the intramolecular hydrogen bonding interactions and excited state proton transfer mechanism for both Br-BTN and CN-BTN systems

“…It is well known that hydrogen bonding is one of the most important weak interactions in the natural world, which plays a signicant role in various branches of natural science and engineering elds. [1][2][3][4][5][6] It is operative in the crystallization of materials, the formation of straightforward properties of associated liquids, and the determination of the three-dimensional structures adopted by biomolecules such as proteins and nucleic bases. Particularly, the hydrogen bond can result in relatively stable supramolecular structures.…”