ISSN:
1572-8951
Keywords:
Nonlinear optics
;
organosilicons
;
hyperpolarizability
;
intramolecular charge transfer
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The synthesis and characterization of a new class of organosilicon compounds with high transparency and nonlinear optical properties are presented. For silicon ended molecules, Si acts mostly as a donor. The presence of a neighbouring silicon does not significantly modify the intramolecular charge transfer (ICT). One Si atom in the middle of a conjugated chain breaks the ICT so that the overall charge transfer may be decomposed into the vectorial sum of each moiety's contribution. Two neighbouring Si-atoms allow more ICT but saturating at a much lower state of interaction between the side groups if compared to a C-C bond. This is the case because hyperconjugation is built up from σ orbitals instead of β ones. Above a certain saturation threshold it deletes the electronic exchange between the two sides which is reflected in a decrease of β0.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00625733
Permalink
