简介: |
Singlemoleculefluorescencetechniqueshavebeensuccessfullyappliedtostudythesinglechainpropertiesofpolyelectrolyte.Thehighsensitivityallowsthestudyofpolyelectrolytechainatextremedilutioncondition,whereaverypuresinglechaininvestigationwasconducted.First-orderconformationtransitionofpoly2-vinylpyridinewassuccessfullyobservedwhenthechargedensityofthechainwasvaried.Also,duetotheextremedilution,theentropyofthesystemwastunedbyadjustingthesaltconcentrationinthesolution.Bydoingso,theextentofcounterioncondensationwaschangedandasaresult,thelocalchemicalequilibriumwasalteredduetosuchanentropyeffect.AmonotonousshiftofthetransitionpointtohighpHvaluewasobservedupontheincreaseofthesaltconcentrationinthesolution. |
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