Yayınlanmış 1 Ocak 2019 | Sürüm v1
Dergi makalesi Açık

Novel axially-substituted silicon phthalocyanines with pH-modulated fluorescence ON/OFF switching properties

  • 1. Gebze Tech Univ, Fac Sci, Dept Chem, TR-41400 Gebze, Kocaeli, Turkey
  • 2. Dokuz Eylul Univ, Chem Technol Program, Izmir Vocat High Sch, TR-35160 Izmir, Turkey

Açıklama

Two novel axially-substituted asymmetric silicon (IV) phthalocyanines, the first one substituted with both polyethylene glycol and indomethacin groups (Pc1) and second one substituted with both polyethylene glycol and mefenamic acid groups (Pc2) have been designed and synthesized for the purpose of pH sensing examinations. Their absorption and fluorescence emission-based spectral properties were investigated in chloroform, tetrahydrofuran and toluene. The pH-sensing properties of Pc1 and Pc2 were examined in detail by using UV-vis absorption and fluorescence spectroscopies in tetrahydrofuran. The effects of the substituents on the spectroscopic properties and pH-sensing behavior of these silicon phthalocyanines were revealed. Pc1 didn't show a pH response; however, Pc2 exhibited a signal increase from pH 5.40 to 0.37 (turn on) and a drastic quenching when pH went from 0.37 to 5.40 (turn off). The protonation/deprotonation stage of the NH group of Pc2 presented fluorescence-based "on-off" type molecular switch properties.

Dosyalar

bib-e8fefb35-e409-4829-8b85-b0aa7115fe7b.txt

Dosyalar (234 Bytes)

Ad Boyut Hepisini indir
md5:cee2e7373fe9c7b3baf2ab5029fe67f3
234 Bytes Ön İzleme İndir