Peripheral Stepwise Degradation of a Porphyrin J-Aggregate

被引：9

作者：

Occhiuto, Ilaria ^{[1
,2
]}

De Luca, Giovanna ^{[3
,4
]}

Trapani, Mariachiara ^{[1
,2
]}

Scolaro, Luigi Monsu ^{[1
,2
,5
]}

Pasternack, Robert F. ^{[6
]}

机构：

[1] Univ Messina, Dipartimento Chim Inorgan Chim Analit & Chim Fis, I-98166 Messina, Italy

[2] CIRCMSB, I-98166 Messina, Italy

[3] Univ Messina, Dipartimento Farmacochim, I-98168 Messina, Italy

[4] CNR, Ist Mat Compositi & Biomed, I-80125 Naples, Italy

[5] CNR, ISMN, I-00185 Rome, Italy

[6] Swarthmore Coll, Dept Chem & Biochem, Swarthmore, PA 19081 USA

来源：

INORGANIC CHEMISTRY | 2012年 / 51卷 / 19期

关键词：

RESONANCE LIGHT-SCATTERING; HIERARCHICAL STRUCTURE; AQUEOUS-SOLUTION; KINETICS; ASSEMBLIES; ABSORPTION; VORTICES; DYNAMICS; NANORODS; SPECTRA;

D O I：

10.1021/ic301570p

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

For metalation of the acidic form of tetrakis(4-sulfonatophenyl)porphyrin (dianionic H4TPPS4) by Cu(II), the order of reagent mixing determines the rate and mechanism of CuTPPS4 formation. When copper salts are added last, the kinetic profile is fit as a (pseudo)-first-order process. However, J-aggregates of the H4TPPS4 porphyrin are rapidly formed at pH similar to 3 when Cu(II) salts are incorporated in solution prior to porphyrin addition. The subsequent porphyrin units metalation leads to the disassembling of these arrays via a pseudo-zero-order kinetic profile, suggesting an attack of the metal ion at the rims of the nanostructure.

引用

页码：10074 / 10076

页数：3

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