%0 Journal Article %1 WOS:000242714700026 %A Neto, Newton Barbosa M %A Oliveira, Samuel L %A Guedes, Ilde %A Dinelli, Luis R %A Misoguti, Lino %A Mendonca, Cleber R %A Batista, Alzir A %A Zilio, Sergio C %C CAIXA POSTAL 26037, 05599-970 SAO PAULO, BRAZIL %D 2006 %I SOC BRASILEIRA QUIMICA %J JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY %K absorption} complexes; optical properties; reverse ruthenium saturable {porphyrins; %N 7 %P 1377-1382 %T Reverse saturable absorption in 5,10,15,20-tetra(4-pyridyl)-21H,23H-porphyrin with ruthenium outlying complexes %V 17 %X Investigations on the excited state absorption signal of 5,10,15,20-tetra( 4- pyridyl)-21H, 23H-porphyrin, modified by either changing the central ion or adding peripheral groups, were performed using 5 ns laser pulses at 532 nm, in association with linear absorbance and fluorescence decay time measurements. The reverse saturable absorption ( RSA) increases remarkably when Zn2+ replaces H+ at the central position of the porphyrin ring. However, it decreases when RuCl2( CO)( PPh3)(2) and RuCl2( CO)( dppb) groups are attached at outlying positions through the pyridine rings, for both the free base and zinc porphyrins. A theoretical model based on Jablonski diagram was used to verify the main reason for the decrease on the RSA signal caused by ruthenium groups.

@article{WOS:000242714700026, abstract = {Investigations on the excited state absorption signal of 5,10,15,20-tetra( 4- pyridyl)-21H, 23H-porphyrin, modified by either changing the central ion or adding peripheral groups, were performed using 5 ns laser pulses at 532 nm, in association with linear absorbance and fluorescence decay time measurements. The reverse saturable absorption ( RSA) increases remarkably when Zn2+ replaces H+ at the central position of the porphyrin ring. However, it decreases when RuCl2( CO)( PPh3)(2) and RuCl2( CO)( dppb) groups are attached at outlying positions through the pyridine rings, for both the free base and zinc porphyrins. A theoretical model based on Jablonski diagram was used to verify the main reason for the decrease on the RSA signal caused by ruthenium groups.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {CAIXA POSTAL 26037, 05599-970 SAO PAULO, BRAZIL}, author = {Neto, Newton Barbosa M and Oliveira, Samuel L and Guedes, Ilde and Dinelli, Luis R and Misoguti, Lino and Mendonca, Cleber R and Batista, Alzir A and Zilio, Sergio C}, biburl = {https://www.bibsonomy.org/bibtex/2a904338e4f071781ebadb4a63a9ec1ce/ppgfis_ufc_br}, interhash = {d476e10f86864a200ac45a554faa0ba3}, intrahash = {a904338e4f071781ebadb4a63a9ec1ce}, issn = {0103-5053}, journal = {JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY}, keywords = {absorption} complexes; optical properties; reverse ruthenium saturable {porphyrins;}, number = 7, pages = {1377-1382}, publisher = {SOC BRASILEIRA QUIMICA}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Reverse saturable absorption in 5,10,15,20-tetra(4-pyridyl)-21H,23H-porphyrin with ruthenium outlying complexes}, tppubtype = {article}, volume = 17, year = 2006 }