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Design, synthesis, spectroscopy, and...

Zhang, Tiangao.

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Design, synthesis, spectroscopy, and Hammett correlation analysis of heteroarylethynyl donor-acceptor porphyrin systems for electro-optic applications.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Design, synthesis, spectroscopy, and Hammett correlation analysis of heteroarylethynyl donor-acceptor porphyrin systems for electro-optic applications./
Author:	Zhang, Tiangao.
Description:	318 p.
Notes:	Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 4954.
Contained By:	Dissertation Abstracts International64-10B.
Subject:	Chemistry, Organic. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3109241
ISBN:	0496567845

Design, synthesis, spectroscopy, and Hammett correlation analysis of heteroarylethynyl donor-acceptor porphyrin systems for electro-optic applications.
Zhang, Tiangao.

Design, synthesis, spectroscopy, and Hammett correlation analysis of heteroarylethynyl donor-acceptor porphyrin systems for electro-optic applications. - 318 p.

Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 4954.

Thesis (Ph.D.)--University of Pennsylvania, 2003.

This thesis focuses on the rational design, synthesis, spectroscopic characterization, photophysics, and structure-property correlation analysis of a host of novel nonlinear optical (NLO) donor-acceptor (hetero)arylethynyl porphyrin chromophores. These compounds have been designed both as NLO monomeric chromophores for incorporation into functional electrooptic polymers and as an integrated family for elucidation of structure-property relationships.

ISBN: 0496567845Subjects--Topical Terms:

516206
Chemistry, Organic.

Design, synthesis, spectroscopy, and Hammett correlation analysis of heteroarylethynyl donor-acceptor porphyrin systems for electro-optic applications.
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100 1 $a Zhang, Tiangao. $3 1932268
245 1 0 $a Design, synthesis, spectroscopy, and Hammett correlation analysis of heteroarylethynyl donor-acceptor porphyrin systems for electro-optic applications.
300 $a 318 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 4954.
500 $a Supervisor: Michael J. Therien.
502 $a Thesis (Ph.D.)--University of Pennsylvania, 2003.
520 $a This thesis focuses on the rational design, synthesis, spectroscopic characterization, photophysics, and structure-property correlation analysis of a host of novel nonlinear optical (NLO) donor-acceptor (hetero)arylethynyl porphyrin chromophores. These compounds have been designed both as NLO monomeric chromophores for incorporation into functional electrooptic polymers and as an integrated family for elucidation of structure-property relationships.
520 $a One of the key accomplishments in this work has been the rational design and synthesis of a host of donor-pi-bridge-acceptor systems featuring a myriad of donor, acceptor, and bridging moieties. Another key accomplishment in this work has been the first synthesis of a trans meso 4-dimethylaminophenylethynyl elaborated, electron-rich Suzuki porphyrin synthon, which enabled the synthesis of highly functionalized asymmetric donor-acceptor porphyrin structures not accessible via conventional synthetic routes. Another important aspect of this thesis involved the derivatization of the prototype push-pull arylethynyl porphyrin into polymer-ready hydroxy and amino functionalized versions for incorporation and organization into processable polymeric matrices.
520 $a Three interrelated classes of compounds were featured: (i) The polymer-ready donor-functionalized NLO porphyrins featuring mono(hydroxyalkyl), bis(hydroxyalkyl), mono(aminoalkyl), and bis(aminophenyl) functionalities; (ii) The novel series of (hetero)arylethynyl push-pull porphyrins featuring such donor moieties as N-phenyl and N-thienyl triphenylamines, N-phenyl and N-thienyl carbazoles, and 3-ethylcarbazol-3-yl, and such potent acceptors as 5-nitrothiazole, 6-nitrobenzothiazole, and terminally nitro substituted oligothiophenes; and (iii) A family of novel meso oligothiophene-substituted asymmetric porphyrins featuring both 5-(4-dimethylaminophenylethynyl) donor and trans meso directly linked 5-nitro oligothiophene acceptors.
520 $a A newly-coined Hammett parameter, reduced Hammett constant, has been proposed and defined in rationalizing successfully the relationship between the chromophore photophysics and the potency of donor/acceptor moieties involving different (hetero)aromatic bridges. This newly defined parameter facilitates quantitative comparison of the efficacy of different pi bridges in the transmission of substituent effect.
520 $a Both photophysics and Hammett correlation analysis predicted that some of the chromophores are expected to possess augmented second-order NLO properties compared to the prototype chromophore which have exhibited outstanding mubeta values. The molecular first-order hyperpolarizabilities of these chromophores are being evaluated with hyper-Rayleigh scattering techniques.
590 $a School code: 0175.
650 4 $a Chemistry, Organic. $3 516206
650 4 $a Chemistry, Inorganic. $3 517253
650 4 $a Chemistry, Polymer. $3 1018428
690 $a 0490
690 $a 0488
690 $a 0495
710 2 0 $a University of Pennsylvania. $3 1017401
773 0 $t Dissertation Abstracts International $g 64-10B.
790 1 0 $a Therien, Michael J., $e advisor
790 $a 0175
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3109241