Optical Behavior of Conjugated Pt-Containing Polymetallaynes Exposed to Gamma-Ray Radiation Doses

被引：15

作者：

Batagin-Neto, Augusto ^{[2
]}

Bronze-Uhle, Erika S. ^{[2
]}

Fernandes, David M. ^{[2
]}

Fratoddi, Ilaria ^{[1
]}

Venditti, Iole ^{[1
]}

Decker, Franco ^{[1
]}

Bodo, Enrico ^{[1
]}

Russo, Maria Vittoria ^{[1
]}

Graeff, Carlos F. O. ^{[2
]}

机构：

[1] Univ Roma La Sapienza, Dept Chem, I-00185 Rome, Italy

[2] FC UNESP, Dept Phys, BR-17033360 Bauru, Brazil

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2011年 / 115卷 / 25期

基金：

巴西圣保罗研究基金会;

关键词：

PLATINUM-ACETYLIDE OLIGOMERS; MOLECULAR CALCULATIONS; POLYMERS; IRRADIATION; DOSIMETRY; SINGLET; LENGTH;

D O I：

10.1021/jp200831z

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of Co-60 gamma irradiation on the absorption and emission spectra of the organometallic polymer [-Pt(PBu3)(2)-C C-C6H4-C6H4-C C-](n) (Pt-DEBP) in chloroform and toluene solutions for dosimetry applications has been studied. The system Pt-DEBP/chloroform can be used for dosimetric applications in two different ways: (i) monitoring of absorption spectra changes for higher doses (higher than 1 Gy), and (ii) monitoring of emission spectra changes for low doses (below 1 Gy). The response of the polymer solution to gamma ray doses has been interpreted with the aid of theoretical studies based on time dependent density functional theory (TD-DFT) calculations on the absorption bands of a model complex and of the possible fragments coming from the degradation of the polymer backbone. It has been proposed that the observed changes are promoted by the attack of radicals, from the radiolysis of the solvent, on the polymer triple bonds.

引用

页码：8047 / 8053

页数：7

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