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Electronic Supplementary Material ( ESI ) for ChemComm
a. College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China b. Beijing NMR Center, Peking University, Beijing, 100871, China c. School of Life Sciences;Expand
12-hydroxy-1-azaperylene-limiting case of the ESIPT system: enol-keto tautomerization in S0 and S1 states.
Observation of absorption and fluorescence of both tautomeric forms and lack of large Stokes shift offluorescence of the keto form classify HAP as the limiting case of the excited-state intramolecular proton transfer system. Expand
Low-temperature spectra of the analogues of 10-hydroxybenzo[h]quinoline as an indication of barrierless ESIPT.
The π-expansion of the 10-HBQ chromophore led to compounds possessing diverse photophysical properties, ranging from the non-ESIPT strongly fluorescent molecule of 10-hydroxy-1-azaperylene to weakly emitting (or nonemitting) molecules, where ESIPT occurs very efficiently. Expand
Dipyrrolonaphthyridinediones--structurally unique cross-conjugated dyes.
Red-emissive dyes based on a previously unknown skeleton--dipyrrolo[1,2-b:1',2'-g][2,6]naphthyridine-5,11-dione--can be easily synthesized from simple and inexpensive reagents by one- or two-stepExpand
Double head-to-tail direct arylation as a viable strategy towards the synthesis of the aza-analog of dihydrocyclopenta[hi]aceanthrylene--an intriguing antiaromatic heterocycle.
This molecule, comprising of two imidazo[1,2-a]pyridine units, is antiaromatic due to the changes in the efficiency of π-electron ring current and it belongs to a class of seldom encountered compounds with a dark lowest electronically excited singlet state. Expand
Vertically π-expanded imidazo[1,2-a]pyridine: the missing link of the puzzle.
Detailed analysis of this compound by using DFT calculations and a low-temperature Shpol'skii matrix revealed phosphorescence emission, thus indicating that efficient intersystem-crossing from the lowest-excited S1 level to the triplet manifold was the competing process with fluorescence. Expand
The impact of solvent polarity on intramolecular proton and electron transfer in 2-alkylamino-4-nitro-5-methyl pyridine N-oxides.
The results of both picosecond fluorescence up-conversion experiments in different solvents and quantum-chemical calculations suggest that in nonpolar media the ESIPT process in 2M5M is favored, while in polar acetonitrile, the N* → PT* transition demands barrier-crossing and thus unfavorable thermodynamic conditions do not allow theESIPT to occur. Expand
Single dibenzoterrylene molecules in naphthalene and 2,3-dimethylnaphthalene crystals: vibronic spectra.
The structure of DBT molecules in a 2,3-DMN crystal is disturbed in comparison with isolated DBT and the main change concerns its central tetracene moiety. Expand
Vibronic spectra of single dibenzoterrylene molecules in anthracene and 2,3-dimethylanthracene crystals
Abstract The vibronic structure of fluorescence excitation spectra of single molecules of dibenzoterrylene (DBT) in anthracene (Ac) and in 2,3-dimethylanthracene (2,3-DMA) crystals were studied at 5Expand