Electronic Transitions in Conformationally Controlled Tetrasilanes with a Wide Range of SiSiSiSi Dihedral Angles

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388963%3A_____%2F14%3A00431050" target="_blank" >RIV/61388963:_____/14:00431050 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1002/chem.201403495" target="_blank" >http://dx.doi.org/10.1002/chem.201403495</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/chem.201403495" target="_blank" >10.1002/chem.201403495</a>

Result language

angličtina

Original language name

Electronic Transitions in Conformationally Controlled Tetrasilanes with a Wide Range of SiSiSiSi Dihedral Angles

Original language description

Unlike p-electron chromophores, the peralkylated n-tetrasilane sigma-electron chromophore resembles a chameleon in that its electronic spectrum changes dramatically as its silicon backbone is twisted almost effortlessly from the syn to the anti conformation (changing the SiSiSiSi dihedral angle omega from 0 to 180 degrees). A combination of UV absorption, magnetic circular dichroism (MCD), and linear dichroism (LD) spectroscopy on conformationally controlled tetrasilanes 1-9, which cover fairly evenly the full range of angles omega, permitted a construction of an experimental correlation diagram for three to four lowest valence electronic states. The free chain tetrasilane n-Si4Me10(10), normally present as a mixture of three enantiomeric conformer pairs of widely different angles w, has also been included in our study. The spectral trends are interpreted in terms of avoided crossings of 1B with 2B and 2A with 3A states, in agreement with SAC-CI calculations on the excited states of 1-

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CC - Organic chemistry

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

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

Name of the periodical

Chemistry - A European Journal

ISSN

0947-6539

e-ISSN

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Volume of the periodical

20

Issue of the periodical within the volume

30

Country of publishing house

DE - GERMANY

Number of pages

11

Pages from-to

9431-9441

UT code for WoS article

000339568800040

EID of the result in the Scopus database

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