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Kinetic and thermodynamic parameters of the perylene/Ag+ exciplex formation. A reaction driven by entropy

✍ Scribed by Albrecht G.E. Läufer; Herbert Dreeskamp; Klaas A. Zachariasse

Publisher: Elsevier Science
Year: 1985
Tongue: English
Weight: 394 KB
Volume: 121
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(85)87133-5

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✦ Synopsis

The perylene/Ag' cxclplex IS formed in methanol solul~on Jc Ihe result of Ihc d)nJmlc quemhrng of peqlcnr m II\ rlrzl exciwd smglet state by AgCIO,. The lempcrnmre dependrnce (bLtucen -60 and +40°C) or the ~xlplcx hr~w-nc and the r&w wnslan~s or exc~plex rormauon and dluoclallon acre swdlcd h) ume-drpendcnl fluoresctxvz meawrcmenls A rexlIon rmhalpy AH = -4 kJ/rnol and entropy AS= 22 J/K mol are ohmmed for the rormanon of rhe ewpl~r Ths cnc~pls~ IC assumed IO be siablhzed mamly by mieracllons orher than Coulomh aiiracilon resullmg from charge lrnnrrer The nnomalou\ly pos&uve value Tar A5 1s assumed 10 anx from the loss or orwmnnon upon sxc~plex rormnuon or the mclhdnol molcculti m the solvenr shell around Ag+_

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