Aggregation-Induced Emission and Temperature-Dependent Luminescence of Potassium Perylenetetracarboxylate

Autor:	Samuel Brum Martins, Subodh K. Gautam, Angelo Malachias, Luiz A. Cury, G. A. M. Sáfar, Olivier Plantevin, Everton Pereira de Andrade
Rok vydání:	2021
Předmět:	Diffraction Range (particle radiation) Photoluminescence Sociology and Political Science Chemistry Potassium Exciton Clinical Biochemistry chemistry.chemical_element Photochemistry Biochemistry Clinical Psychology Excited state Molecule Luminescence Law Spectroscopy Social Sciences (miscellaneous)
Zdroj:	Journal of Fluorescence. 31:1855-1862
ISSN:	1573-4994 1053-0509
Popis:	Investigation of temperature-dependent photoluminescent properties of potassium perylene-3,4,9,10-tetracarboxylate (K4PTC), a molecule with no internal rotational degrees of freedom, shows aggregation-induced enhanced emission at room temperature. The different excitonic emission processes are dependent of temperature, some of which quenches in an intermediate temperature range (from 50 to 150 K). The exciton excited states switching phenomenon from "dark" to "bright" states is observed and its explained using Herzberg-Teller selection rule. K4PTC is a molecule comparable to the size of its precursor, perylene-3,4,9,10-tetracarboxylic anhydride (PTCDA) and is highly soluble in water, contrary to PTCDA, which is poorly soluble in most solvents. Powder x-ray diffraction measurements corroborate a lesser degree of ordering of bulk K4PTC compared to bulk PTCDA. The green luminescent molecule could, in principle, be used as a biomarker, or in photodynamic therapy, if further studies show relatively low toxicity.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::91f65cd92210e7b996cccea4c8325229 https://doi.org/10.1007/s10895-021-02810-4 Zobrazit plný text záznamu Full text from SpringerLink