Synthesis and studies of two proton–receptor fluorescent probes based on 1, 8‐naphthalimide. (9th November 2016)

• Record Type: Journal Article
• Authors: Aderinto, Stephen Opeyemi; Zhang, Han; Wu, Huilu; Chen, Chengyong; Zhang, Jiawen; Peng, Hongping; Yang, Zaihui; Wang, Fei
• Is Part Of: Coloration technology. Volume 133:Number 1(2017)
• Page Start: 40
• Page End: 49
• Publication Date: 2016-11-09
• Subjects: Color -- Periodicals; Color in the textile industries -- Periodicals; Dyes and dyeing -- Periodicals; 667
• DOI: 10.1111/cote.12250
• Languages: English
• ISSNs: 1472-3581

Abstract

Abstract : Two isomeric proton–receptor fluorescent probes1 and2 were designed and synthesised by employing the photoinduced electron transfer (PET) principle of a 'fluorophore–spacer–receptor' module. Their photophysical characteristics were investigated in organic solvents and Britton–Robinson buffer/EtOH (1:1, v/v) solution. Probe1 was sensitive in the stronger acidic region of 2.21–4.56, while probe2 displayed a good response towards protons within the pH scope of 4.10–6.09. The specificity of the probes toward protons in commonly used buffer solutions and in the presence of metal cations, Na(i ), K(i ), Ca(ii ), Mg(ii ), Al(iii ), Pb(ii ), Fe(iii ), Ni(ii ), Zn(ii ), Cu(ii ), Hg(ii ), Ag(i ), Co(ii ), Cr(iii ), Mn(ii ), and Cd(ii ) ions, was studied by monitoring the changes in their fluorescence intensity. The tested metal ions exerted no noticeable influence. The results obtained show that the synthesised proton–receptor fluorescent probes have the capability to act as pH‐sensitive probes for monitoring pH variations in the range 2.21–6.09.