Unveiling the role of upper excited electronic states in the photochemistry and laser performance of anti-B18H22

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F20%3A43901368" target="_blank" >RIV/60076658:12310/20:43901368 - isvavai.cz</a>

Alternative codes found

RIV/61388980:_____/20:00532242

Result on the web

<a href="https://pubs.rsc.org/en/content/articlelanding/2020/TC/D0TC02309D#!divAbstract" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2020/TC/D0TC02309D#!divAbstract</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d0tc02309d" target="_blank" >10.1039/d0tc02309d</a>

Result language

angličtina

Original language name

Unveiling the role of upper excited electronic states in the photochemistry and laser performance of anti-B18H22

Original language description

In the search for innovative new light sources, the discovery that solutions of the boron hydride anti-B18H22 generate photostable blue laser emission stands out in its significance as the first laser borane. Surprisingly, though, the laser performance of anti-B18H22 (similar to 10% efficiency) does not match the expectations based on its exceptional photophysical properties (Phi(f) = 0.97 and high photostability). To understand this contradiction, we herein present an investigation into the upper excited states of the anti-B18H22 photophysical system, which we suggest to be the most relevant factor to its laser performance. The use of computational quantum chemistry, laser and UV-vis spectroscopy, NMR spectroscopy, and mass spectrometry unveil the role of the upper excited states on the laser performance of anti-B18H22, showing that efficient excited state absorption (ESA) leads to the population of these states, and results not only in the loss of laser efficiency, but also in the activation of chemically reactive relaxation pathways and the formation of photochemically produced novel molecular species. The likely composition of these photoproducts, formed upon prolonged high intensity laser irradiation, is inferred from their molecular masses, NMR properties, and calculated natural orbitals. Together, these results are of key importance to the complete understanding of the anti-B18H22 photophysical system and provide valuable information to chemists and laser physicists working to mitigate deficiencies and enhance the performance of the next generation of borane lasers and borane-based photoactive materials.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

<a href="/en/project/GA18-20286S" target="_blank" >GA18-20286S: Boron Hydride Cluster Lasers: Understanding the Chemical and Structural Factors that Determine the Photophysics of anti-B18H22 and its Derivatives</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Journal of Materials Chemistry C

ISSN

2050-7526

e-ISSN

—

Volume of the periodical

8

Issue of the periodical within the volume

37

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

12806-12818

UT code for WoS article

000574416900037

EID of the result in the Scopus database

2-s2.0-85094957968