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Lookup NU author(s): Professor Katarina Novakovic, Dr Christophe Grosjean, Dr Mark Willis, Professor Allen Wright
This Letter reports an experimental study which achieves reproducible oscillations in both pH and heat output (Qr) during a palladium-catalysed phenylacetylene oxidative carbonylation reaction in an homogeneous catalytic system (PdI2-KI-Air-NaOAc in methanol solution). Experiments were performed in an HEL SIMULAR™ reaction calorimeter with precise control of temperature and gas flow rates. Under certain experimental conditions a second set of oscillations was observed. Oscillations in Qr were exothermic with no corresponding endotherm. Total energy released during oscillations followed a staircase function with a maximum of 600 J/oscillation. Heat release was in phase with pH fall, and decreased as pH increased. © 2006 Elsevier B.V. All rights reserved.
Author(s): Novakovic K, Grosjean C, Scott SK, Whiting A, Willis MJ, Wright AR
Publication type: Article
Publication status: Published
Journal: Chemical Physics Letters
Year: 2007
Volume: 435
Issue: 1-3
Pages: 142-147
Print publication date: 12/02/2007
ISSN (print): 0009-2614
ISSN (electronic): 1873-4448
Publisher: Elsevier BV
URL: http://dx.doi.org/10.1016/j.cplett.2006.12.040
DOI: 10.1016/j.cplett.2006.12.040
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