Ion Calorimetry: Using Mass Spectrometry to Measure Melting Points

42Citations
Citations of this article
22Readers
Mendeley users who have this article in their library.

Abstract

Calorimetry measurements have been used to probe the melting of aluminum cluster cations with 63 to 83 atoms. Heat capacities were determined as a function of temperature (from 150 to 1050 K) for size-selected cluster ions using an approach based on multicollision-induced dissociation. The experimental method is described in detail and the assumptions are critically evaluated. Most of the aluminum clusters in the size range examined here show a distinct peak in their heat capacities that is attributed to a melting transition (the peak is due to the latent heat). The melting temperatures are below the bulk melting point and show enormous fluctuations as a function of cluster size. Some clusters (for example, n = 64, 68, and 69) do not show peaks in their heat capacities. This behavior is probably due to the clusters having a disordered solid-like phase, so that melting occurs without a latent heat. © 2007 American Society for Mass Spectrometry.

Cite

CITATION STYLE

APA

Neal, C. M., Starace, A. K., & Jarrold, M. F. (2007). Ion Calorimetry: Using Mass Spectrometry to Measure Melting Points. Journal of the American Society for Mass Spectrometry, 18(1), 74–81. https://doi.org/10.1016/j.jasms.2006.08.019

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free