Interaction of Gold Nanoparticles with Cyanine Dyes in Cholesteric DNA Submicroparticles

被引：5

作者：

Morozov, V. N. ^{[1
]}

Klimovich, M. A. ^{[1
,2
]}

Kolyvanova, M. A. ^{[1
,2
]}

Dement'eva, O., V ^{[3
]}

Rudoy, V. M. ^{[3
]}

Kuzmin, V. A. ^{[1
]}

机构：

[1] Russian Acad Sci, Emanuel Inst Biochem Phys, Moscow 119334, Russia

[2] Fed Med & Biol Agcy, Burnazyan Fed Med Biophys Ctr, Moscow 123098, Russia

[3] Russian Acad Sci, Frumkin Inst Phys Chem & Electrochem, Moscow 119071, Russia

来源：

HIGH ENERGY CHEMISTRY | 2021年 / 55卷 / 05期

关键词：

DNA liquid crystals; circular dichroism; gold nanoparticles; SYBR Green I; PicoGreen; SYBR GREEN I; LIQUID-CRYSTALLINE PHASE; FLUORESCENCE; PARTICLES; DISPERSIONS; TEMPERATURE; MOLECULES; SYSTEM;

D O I：

10.1134/S0018143921050088

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：

Structural changes in particles of cholesteric liquid crystal dispersion (CLCD) of DNA during the formation of complexes of the cyanine dyes SYBR Green I (SG) and PicoGreen (PG) with negatively charged gold nanoparticles (NPs) have been studied using circular dichroism spectroscopy. It has been shown that in the presence of the dyes, the degradation of the cholesteric DNA packing by the action of gold NPs increases by a factor of similar to 1.6 (SG) or similar to 2.7 (PG). Gold NPs have been found to prevent the formation of the reentrant cholesteric DNA phase during the quenching of DNA CLCD-its heating to 80 degrees C and cooling to 20 degrees C. Pretreatment of the DNA dispersion with SG or PG in this case facilitates the restoration of the circular dichroism signal. A greater effect is noted for PG, which can be explained by stronger electrostatic interaction of this dye with Au NPs, since its charge is +3, whereas the charge of SG is +2.

引用

页码：341 / 348

页数：8

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