使用可见激光解吸电离对 Rhodamine 610 阳离子进行碎裂研究。

A fragmentation study of the Rhodamine 610 cation using visible-laser desorption ionization.

机构信息

Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7.

出版信息

J Mass Spectrom. 2010 Aug;45(8):909-14. doi: 10.1002/jms.1779.

PMID:20648675

Abstract

The fragmentation of a potential visible matrix-assisted laser desorption ionization: Rhodamine 610 was studied under 532 nm visible irradiation, as a function of anion counter ion. It was found that at a fixed fluence, the chloride salt produced fewer fragments than those formed with ClO(4)(-) or BF(4)(-). Evidence presented suggests that the degree of fragmentation is inversely proportional to the strength of the contact ion pair in the solid state; that is, more energy is deposited into the radical cation which can lead to fragmentation when less energy is required to separate the ion pair. Similar results were found for salts of Rhodamine 6G.

摘要

潜在可见基质辅助激光解吸电离的碎裂

以 532nm 可见光辐照作为函数，研究了罗丹明 610 与抗衡阴离子的关系。结果发现，在固定的辐照强度下，与 ClO4(-)或 BF4(-)相比，氯盐产生的碎片较少。实验结果表明，碎裂程度与固态下的接触离子对强度成反比；也就是说，当需要更少的能量来分离离子对时，更多的能量被沉积到自由基阳离子中，这可能导致碎裂。罗丹明 6G 的盐也得到了类似的结果。