Sourav Dutta's research while affiliated with University of Calcutta and other places

... The last step in this sequence of processes is the ground state intramolecular proton transfer (GSIPT) reaction, converting the tautomeric form to the normal one. The ESIPT photoreaction (Scheme 1) is highly sensitive to substituents [15][16][17][18][19][20][21][22][23][24][25][26][27] and coordinated metal ions [28][29][30][31][32][33], protonation/deprotonation [34][35][36][37][38][39][40][41], the state of aggregation [42,43], the polarity of solvent [44][45][46][47][48] and the presence of various analytes [49][50][51][52][53][54][55][56]. If the excited state tautomerization (normal-to-tautomeric) is barrierless, the only form to emit is the tautomeric one, which typically luminesces with rather large Stokes shift [57,58]. ...

... The last step in this sequence of processes is the ground state intramolecular proton transfer (GSIPT) reaction, converting the tautomeric form to the normal one. The ESIPT photoreaction (Scheme 1) is highly sensitive to substituents [15][16][17][18][19][20][21][22][23][24][25][26][27] and coordinated metal ions [28][29][30][31][32][33], protonation/deprotonation [34][35][36][37][38][39][40][41], the state of aggregation [42,43], the polarity of solvent [44][45][46][47][48] and the presence of various analytes [49][50][51][52][53][54][55][56]. If the excited state tautomerization (normal-to-tautomeric) is barrierless, the only form to emit is the tautomeric one, which typically luminesces with rather large Stokes shift [57,58]. ...

... 23 However, semiconductor QDs are highly toxic, and organic dyes are easy to photobleach and have poor light stability. 24 Carbon dots (CDs) have the advantages of low toxicity, low cost, and environmental friendliness. The surfaces of CDs are rich in functional groups, which can be easily modied by biomolecules including aptamers and antibodies. ...