TY - JOUR
T1 - Anomalous H+ and D+ Excited-State Proton-Transfer Rate in H2O/D2O Mixtures
AU - Gajst, Oren
AU - Simkovitch, Ron
AU - Huppert, Dan
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/9/21
Y1 - 2017/9/21
N2 - We used the time-resolved fluorescence technique to measure the excited-state proton-Transfer (ESPT) rates from 8-hydroxy-1,3,6-pyrenetrisulfonate (HPTS) to solvent mixtures of H2O and D2O. We found an anomalous deviation from linear mole-fraction behavior of the ESPT rate in H2O/D2O mixtures. We provide a chemical model based on equilibrium constant of the reaction H2O + D2O â" 2HOD and rate constants of the ESPT process of H and D transfers from HPTS to the mixed solvent. Anomalous deviation from linear mole-fraction behavior was previously found for H+/D+ conductance in these mixtures.
AB - We used the time-resolved fluorescence technique to measure the excited-state proton-Transfer (ESPT) rates from 8-hydroxy-1,3,6-pyrenetrisulfonate (HPTS) to solvent mixtures of H2O and D2O. We found an anomalous deviation from linear mole-fraction behavior of the ESPT rate in H2O/D2O mixtures. We provide a chemical model based on equilibrium constant of the reaction H2O + D2O â" 2HOD and rate constants of the ESPT process of H and D transfers from HPTS to the mixed solvent. Anomalous deviation from linear mole-fraction behavior was previously found for H+/D+ conductance in these mixtures.
UR - http://www.scopus.com/inward/record.url?scp=85029758517&partnerID=8YFLogxK
U2 - 10.1021/acs.jpca.7b04361
DO - 10.1021/acs.jpca.7b04361
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AN - SCOPUS:85029758517
SN - 1089-5639
VL - 121
SP - 6917
EP - 6924
JO - Journal of Physical Chemistry A
JF - Journal of Physical Chemistry A
IS - 37
ER -