Thermochromic Fluorescence from B18H20(NC5H5)(2): An Inorganic-Organic Composite Luminescent Compound with an Unusual Molecular Geometry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F17%3A00474238" target="_blank" >RIV/68378271:_____/17:00474238 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388980:_____/17:00474238 RIV/00216208:11310/17:10361086

Výsledek na webu

<a href="http://dx.doi.org/10.1002/adom.201600694" target="_blank" >http://dx.doi.org/10.1002/adom.201600694</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adom.201600694" target="_blank" >10.1002/adom.201600694</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermochromic Fluorescence from B18H20(NC5H5)(2): An Inorganic-Organic Composite Luminescent Compound with an Unusual Molecular Geometry

Popis výsledku v původním jazyce

B18H20(NC5H5)(2) is a rare example of two conjoined boron hydride subclusters of nido and arachno geometrical character. At room temperature, solutions of B18H20(NC5H5)(2) emit a 690 nm fluorescence. In the solid state, this emission is shifted to 620 nm and intensifies due to restriction of the rotation of the pyridine ligands. In addition, there is a thermochromicity to the fluorescence of B18H20(NC5H5)(2). Cooling to 8 K engenders a further shift in the emission wavelength to 585 nm and a twofold increase in intensity. Immobilization in a polystyrene thin-film matrix results in an efficient absorption of pumping excitation energy at 414 nm and a 609 nm photostable fluorescence. Such fluorescence from polystyrene thin films containing B18H20(NC5H5)(2) can also be stimulated by emission from the highly fluorescent borane anti-B18H22 via energy transfer mechanisms. Polystyrene thin-film membranes doped with 1: 1 mixtures of anti-B18H22 and B18H20(NC5H5)(2) thus emit a 609 nm fluorescence and absorb light across more than 300 nm (250-550 nm). This is a significant spectral coverage possibly useful for luminescent solar concentrators. B18H20(NC5H5)(2) is fully structurally characterized using NMR spectroscopy, mass spectrometry, and single-crystal X-ray diffraction analysis, and its ground-state and excited-state photophysics are investigated with UV-vis spectroscopy and quantum-chemistry computational methods.

Název v anglickém jazyce

Thermochromic Fluorescence from B18H20(NC5H5)(2): An Inorganic-Organic Composite Luminescent Compound with an Unusual Molecular Geometry

Popis výsledku anglicky

B18H20(NC5H5)(2) is a rare example of two conjoined boron hydride subclusters of nido and arachno geometrical character. At room temperature, solutions of B18H20(NC5H5)(2) emit a 690 nm fluorescence. In the solid state, this emission is shifted to 620 nm and intensifies due to restriction of the rotation of the pyridine ligands. In addition, there is a thermochromicity to the fluorescence of B18H20(NC5H5)(2). Cooling to 8 K engenders a further shift in the emission wavelength to 585 nm and a twofold increase in intensity. Immobilization in a polystyrene thin-film matrix results in an efficient absorption of pumping excitation energy at 414 nm and a 609 nm photostable fluorescence. Such fluorescence from polystyrene thin films containing B18H20(NC5H5)(2) can also be stimulated by emission from the highly fluorescent borane anti-B18H22 via energy transfer mechanisms. Polystyrene thin-film membranes doped with 1: 1 mixtures of anti-B18H22 and B18H20(NC5H5)(2) thus emit a 609 nm fluorescence and absorb light across more than 300 nm (250-550 nm). This is a significant spectral coverage possibly useful for luminescent solar concentrators. B18H20(NC5H5)(2) is fully structurally characterized using NMR spectroscopy, mass spectrometry, and single-crystal X-ray diffraction analysis, and its ground-state and excited-state photophysics are investigated with UV-vis spectroscopy and quantum-chemistry computational methods.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

<a href="/cs/project/GA13-09876S" target="_blank" >GA13-09876S: Anorganické nanoscintilátory: netradiční syntéza a rozměrově závislé charakteristiky.</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Advanced Optical Materials

ISSN

2195-1071

e-ISSN

—

Svazek periodika

5

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

16

Strana od-do

—

Kód UT WoS článku

000397806200006

EID výsledku v databázi Scopus

2-s2.0-85011342603