当前位置： SCI文献检索 > PHOTOCHEMISTRY AND PHOTOBIOLOGY期刊下所有文献 > Axially Decorated SiIV -phthalocyanines Bearing Mannose- or Ammonium-conjugated Siloxanes: Comparative Bacterial Labeling and Photodynamic Inactivation.

Axially Decorated SiIV -phthalocyanines Bearing Mannose- or Ammonium-conjugated Siloxanes: Comparative Bacterial Labeling and Photodynamic Inactivation.

Abstract：

:Herein, we present a comparative study about the photoinactivation of Staphylococcus aureus (Gram-positive model) and Escherichia coli (Gram-negative model) employing a neutral and a dicationic axially functionalized SiIV -phthalocyanine. Depending on the charge of the siloxane moiety (neutral monosaccharide or cationic ammonium salt), different interactions with the bacteria were observed, and a differential photoinactivation was facilitated. The intensity of the fluorescence labeling correlated with the photoinactivation of the two types of bacteria: While the neutral species only significantly affected the Gram-positive cells, we observed that the positively charged photosensitizer interacted both with the Gram-positive and with the Gram-negative models. The dicationic photosensitizer labeled both models with a characteristic deep-red fluorescence and photoinactivated both classes of prokaryotes. In general, our study clearly demonstrates that axially ammoniumsiloxane-functionalized Si(IV) phthalocyaninates constitute excellent photosensitizers due to their weak aggregation in aqueous environments. In particular, we also show that charge-based targeting with axial ammonium groups leads toward broad-spectrum SiIV -phthalocyanines for photodynamic inactivation of bacteria.

journal_name

Photochem Photobiol

journal_title

Photochemistry and photobiology

authors

Grüner MC,Niemann S,Faust A,Strassert CA

doi

10.1111/php.12881

subject

Has Abstract

pub_date

2018-09-01 00:00:00

pages

890-899

issue

5

eissn

0031-8655

issn

1751-1097

journal_volume

94

pub_type

杂志文章

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