TY  - JOUR
T1  - Photocharacterization and pH Sensing Properties of a Novel Synthesized Fluorescent Schiff Base Derivative
TT  - Yeni Sentezlenen Floresan Schiff Bazı Türevinin Fotokarakterizasyonu ve pH Algılama Özellikleri
AU  - Zurnacı, Merve
PY  - 2025
DA  - September
Y2  - 2025
DO  - 10.31466/kfbd.1617959
JF  - Karadeniz Fen Bilimleri Dergisi
JO  - KFBD
PB  - Giresun Üniversitesi
WT  - DergiPark
SN  - 2564-7377
SP  - 1119
EP  - 1132
VL  - 15
IS  - 3
LA  - en
AB  - Design and synthesis of different, highly sensitive and fast response fluorescent materials are very important in the development of pH sensors. In this study, a new pH-sensitive Schiff-base ligand (PHS1) was synthesized by the condensation reaction of newly synthesized 1,3,4-thiadiazole derivative containing phenanthroimidazole (PHT1) with 3,5-ditertbutylsalicylaldehyde (1:1) in ethanol. The molecular structure was confirmed by structural characterization methods. The absorption and fluorescence properties of PHS1 were investigated in DMSO to determine the photocharacterization properties. Then, PHS1 was investigated as a fluorescent pH sensor. UV absorption and emission studies of PHS1 with varying pH (at pH=2.0, 4.0, 6.0, 8.0, 10.0 and 12.0) were determined in Britton-Robinson buffer. The absorption wavelength recorded at 345 nm at pH 2.0 showed bathochromic effect as pH increased (at pH= 4.0; 6.0 and 8.0). At pH 10.0 and 12.0, PHS1 showed two absorption peaks at 357 nm and a new low energy absorption band at 405 nm. The fluorescence spectrum of PHS1 showed a red shift with an increasing wavelength from 439 nm to 473 nm between pH=2.0 and 12.0. These results showed that PHS1 is sensitive to pH change in acidic and basic environments.
KW  - Schiff Base Derivative
KW  - pH Sensor
KW  - Photocharacterization
KW  - UV-Vis absorption
KW  - Fluorescence
N2  - pH sensörlerinin geliştirilmesinde, farklı, yüksek hassasiyet ve hızlı tepki floresan malzemelerin tasarımı ve sentezi çok önemlidir. Bu çalışmada, yeni sentezlenen fenantroimidazol içeren 1,3,4-tiyadiazol türevinin (PHT1) etanolde 3,5-ditertbütilsalisilaldehit (1:1) ile kondenzasyon reaksiyonu ile yeni bir pH-duyarlı Schiff bazı ligandı (PHS1) sentezlendi. Moleküler yapı, yapısal karakterizasyon yöntemleri ile doğrulandı. PHS1'in absorpsiyon ve floresan özellikleri, fotokarakterizasyon özelliklerini belirlemek için DMSO'da incelendi. Daha sonra, PHS1 floresan pH sensörü olarak araştırıldı. PHS1'in değişen pH'ta (pH=2,0, 4,0, 6,0, 8,0, 10,0 ve 12,0'da) UV absorpsiyon ve emisyon çalışmaları Britton-Robinson tamponunda belirlendi. pH 2,0'de 345 nm'de kaydedilen emilim dalga boyu, pH arttıkça batokromik etki gösterdi (pH= 4,0'da; 6,0 ve 8,0). pH 10,0 ve 12,0'de, PHS1 357 nm'de iki emilim tepe noktası ve 405 nm'de yeni bir düşük enerjili emilim bandı gösterdi. PHS1'in floresan spektrumu pH=2,0-12,0 arasında 439 nm’den 473 nm’ye artan bir dalga boyu ile kırmızıya kayma gösterdi. Bu sonuçlar PHS1'in asidik ve bazik ortamlardaki pH değişimine duyarlı olduğunu gösterdi.
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UR  - https://doi.org/10.31466/kfbd.1617959
L1  - https://dergipark.org.tr/tr/download/article-file/4512756
ER  -