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dc.contributor.authorBaksi, Ananya
dc.contributor.authorBootharaju, Megalamane Siddaramappa
dc.contributor.authorChhotaray, Pratap K.
dc.contributor.authorChakraborty, Papri
dc.contributor.authorMondal, Biswajit
dc.contributor.authorBhat, Shridevi
dc.contributor.authorGardas, Ramesh L.
dc.contributor.authorPradeep, Thalappil
dc.date.accessioned2017-11-09T06:33:07Z
dc.date.available2017-11-09T06:33:07Z
dc.date.issued2017-11-16
dc.identifier.citationBaksi A, Bootharaju MS, Chhotaray PK, Chakraborty P, Mondal B, et al. (2017) Reactivity of Monolayer Protected Silver Clusters Towards Excess Ligand: A Calorimetric Study. The Journal of Physical Chemistry C. Available: http://dx.doi.org/10.1021/acs.jpcc.7b07557.
dc.identifier.issn1932-7447
dc.identifier.issn1932-7455
dc.identifier.doi10.1021/acs.jpcc.7b07557
dc.identifier.urihttp://hdl.handle.net/10754/626133
dc.description.abstractReactivity of monolayer protected atomically precise clusters of noble metals is of significant research interest. Till date very few experimental data are available on the reaction thermodynamics of such clusters. Here we report a calorimetric study of the reaction of glutathione (GSH) protected silver clusters in presence of excess ligand, GSH using isothermal titration calorimetry (ITC). We have studied Ag11(SG)7 and Ag32(SG)19 clusters and compared their reactivity with GSH protected silver nanoparticles (AgNPs) and silver ions. Clusters show intermediate reactivity towards excess ligand com-pared to nanoparticles and silver ions. Several control experiments were performed to understand the degradation mech-anism of these silver clusters and nanoparticles. Effect of dissolved oxygen in the degradation process was studied in de-tail and found that it did not have a significant role, although alternate pathways of degradation with the involvement of oxygen cannot be ruled out. Direct confirmation of the fact that functionalized metal clusters fall in-between NPs and atomic systems in their stability is obtained experimentally for the first time. Several other thermophysical parameters of these clusters were also determined including, density, speed of sound, isentropic compressibility and coefficient of thermal expansion.
dc.description.sponsorshipA.B. and T.P. thank the Department of Science and Technology, Government of India for continuous support our of research program on nanomaterials. A.B. thanks Indian Institute of Technology Madras for fellowship.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acs.jpcc.7b07557
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.7b07557.
dc.titleReactivity of Monolayer Protected Silver Clusters Towards Excess Ligand: A Calorimetric Study
dc.typeArticle
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalThe Journal of Physical Chemistry C
dc.eprint.versionPost-print
dc.contributor.institutionKarlsruhe Institute of Technology, Germany.
dc.contributor.institutionDST Unit of Nanoscience and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai – 600036, India.
dc.contributor.institutionDepartment of Chemistry, The University of Alabama, Tuscaloosa, AL 35487, USA.
dc.contributor.institutionDepartment of Chemistry, Institute of Technology Madras, Chennai – 600036, India.
kaust.personBootharaju, Megalamane Siddaramappa
refterms.dateFOA2018-10-31T00:00:00Z
dc.date.published-online2017-11-16
dc.date.published-print2017-11-30


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