Ultraviolet photochemistry of diacetylene: Metastable C4H2*+ C2H2 reaction in helium and nitrogen

RK Frost, GS Zavarin, TS Zwier

Index: Frost, Rex K.; Zavarin, Gary S.; Zwier, Timothy S. Journal of Physical Chemistry, 1995 , vol. 99, # 23 p. 9408 - 9415

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Citation Number: 31

Abstract

The collisional photochemistry of diacetylene triplet metastable state (C4H2*) with acetylene in nitrogen and helium buffers is studied in a reaction tube attached to a pulsed nozzle. The photolysis laser counterpropagates the molecular expansion through the reaction tube exciting the C4H2'Au-I&+ 2'06'0 transition at 231.4 nm. Efficient intersystem crossing forms the triplet state from which reaction occurs. The finite 8 mm length of the tube serves to ...

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