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Slow Evaporation of Water from Hydrated Salen Transition Metal Complexes in the Gas Phase Reveals Details of Metal Ligand Interactions

Lee, Sang-Won and Chang, Sukbok and Kossakovski, Dmitri and Cox, Heather and Beauchamp, J. L. (1999) Slow Evaporation of Water from Hydrated Salen Transition Metal Complexes in the Gas Phase Reveals Details of Metal Ligand Interactions. Journal of the American Chemical Society, 121 (43). pp. 10152-10156. ISSN 0002-7863. https://resolver.caltech.edu/CaltechAUTHORS:20180413-134620236

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Abstract

Water clusters of salen [N,N‘-ethylenebis(salicylideneaminato)] transition metal complexes [(salen)M, M = Cr^(3+), Mn^(3+), Co^(3+)] formed by electrospray source have been investigated using a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer. Kinetics of water evaporation from the cluster ions is observed to be highly dependent on the central metal ion. For example, the evaporation rate of water from solvated salen chromium ion ([SCr + nH_2O]^+) is significantly slower than that from solvated salen manganese ([SMn + nH_2O]+) and solvated salen cobalt ([SCo + nH_2O]^+) ions. Furthermore, the clusters of salen chromium ions with two waters attached exhibit special stability, indicated by their prominence in the overall cluster distribution. In contrast, no specific solvation is observed for the manganese and cobalt complexes. The lability observed for the hydrated salen cobalt complex suggests that the high-spin state is likely to be involved in the evaporation process. These results are in accordance with observations in solution-phase chemistry and can be explained by ligand field theory.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://dx.doi.org/10.1021/ja991658jDOIArticle
ORCID:
AuthorORCID
Beauchamp, J. L.0000-0001-8839-4822
Additional Information:© 1999 American Chemical Society. ReceiVed May 18, 1999. The authors are grateful to Professor Harry B. Gray for helpful discussions and Mr. Joshua Maurer for acquiring SQUID data. This work was supported in part by the National Science Foundation under Grant CHE-9727566. Funds for instrument development have been provided by ARPA and the DOD-URI program (ONR-N0014-92-J-1901). We are also indebted to the Beckman Foundation and Institute for the initial funding and continuing support of the research facilities.
Funders:
Funding AgencyGrant Number
NSFCHE-9727566
Advanced Research Projects Agency (ARPA)UNSPECIFIED
Office of Naval Research (ONR)N0014-92-J-1901
Arnold and Mabel Beckman FoundationUNSPECIFIED
Caltech Beckman InstituteUNSPECIFIED
Issue or Number:43
Record Number:CaltechAUTHORS:20180413-134620236
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180413-134620236
Official Citation:Slow Evaporation of Water from Hydrated Salen Transition Metal Complexes in the Gas Phase Reveals Details of Metal Ligand Interactions Sang-Won Lee, Sukbok Chang, Dmitri Kossakovski, Heather Cox, and J. L. Beauchamp Journal of the American Chemical Society 1999 121 (43), 10152-10156 DOI: 10.1021/ja991658j
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85842
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:13 Apr 2018 20:55
Last Modified:03 Oct 2019 19:36

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