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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Estudo teórico da cloro ftalocianina de alumínio por PM6 e DFT / Theoretical study of chloro aluminium phthalocyanine in PM6 and DFT

Vaz, Wesley Fonseca 28 November 2014 (has links)
Submitted by Erika Demachki (erikademachki@gmail.com) on 2015-05-18T17:45:41Z No. of bitstreams: 2 Dissertação - Wesley Fonseca Vaz - 2014.pdf: 3341103 bytes, checksum: ff3f9012c7c4e42ee917f04d8273126b (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Approved for entry into archive by Erika Demachki (erikademachki@gmail.com) on 2015-05-18T17:56:16Z (GMT) No. of bitstreams: 2 Dissertação - Wesley Fonseca Vaz - 2014.pdf: 3341103 bytes, checksum: ff3f9012c7c4e42ee917f04d8273126b (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Made available in DSpace on 2015-05-18T17:56:16Z (GMT). No. of bitstreams: 2 Dissertação - Wesley Fonseca Vaz - 2014.pdf: 3341103 bytes, checksum: ff3f9012c7c4e42ee917f04d8273126b (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2014-11-28 / The molecular structure of chloro-aluminum phthalocyanine (AlClPc) was determined by B3LYP/6-31+G* and compared to the X-ray diffraction data. Theoretical calculations predict AlClPc C4V symmetry. The agreement between experimental and theoretical values have root mean square errors of 0.0404 Å for the bond lengths, and 2,46º for the dihedral angles. The AlClPc PM6 aggregates are favorable when compared to the isolated molecule. The excited states calculated with PM6/CI agree with the experimental values for the Q and B-bands, except for the absorption intensities. The splitting calculated for Q-bands was 69 nm, whereas the value found experimentally is 80 nm. PM6/PCM absorption spectrum for AlClPc in ethanol presented 615 nm for Q-band in a good agreement with the experimental value of 675 nm. / A estrutura molecular da Cloro Ftalocianina de Alumínio (AlClPc) foi determinada por cálculos B3LYP/6-31+G* e comparada com dados experimentais obtidos por difração de raios-X. Os cálculos teóricos preveem uma molécula com simetria C4v. A concordância entre os valores experimentais e teóricos apresentam erros médios quadráticos de 0,0404 Å, para as distâncias de ligação, e 2,46º para os ângulos diedros. Os agregados moleculares da AlClPc calculados via PM6 mostram que o empacotamento dessas moléculas é mais favorável do que sua forma isolada. Os estados excitados calculados com PM6/CI concordam com os valores experimentais para as bandas Q e B, exceto para as intensidades das absorções. A separação de bandas calculada para a banda Q foi de 69 nm, enquanto que o valor observado experimentalmente é de 80 nm. O espectro de absorção teórico para a AlClPc em etanol calculado com PM6/PCM apresenta a banda Q em 615 nm e tem boa concordância com o valor experimental de 675 nm.

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