An object of the present invention is to provide: a developer that can provide a thermosensitive recording material excellent in color development sensitivity and storage stability; and a thermosensitive recording material obtained using the developer. The object is achieved by a developer including a compound represented by the following Formula (1).
(In Formula (1), a, A, and L are as follows: a is an integer selected from 1 to 5, A is each independently a fluoro group or a perfluoroalkyl group, and L is any of functional groups represented by the following Formula (2) :
wherein in Formula (2), R is a C1-C4 alkyl group, and * represents a binding site to a sulfur atom in Formula (1)).
本发明的目的是提供:一种能提供显色灵敏度和储存稳定性均优异的热敏记录材料的显影剂;以及一种使用该显影剂获得的热敏记录材料。本发明的目的是通过一种显影剂来实现的,该显影剂包括由下式(1)表示的化合物。
(在式 (1) 中,a、A 和 L 如下:a 是选自 1 至 5 的整数,A 独立地分别是
氟基或
全氟烷基,L 是下式 (2) 所代表的任何官能团:
其中,在式 (2) 中,R 是 C1-C4 烷基,* 代表与式 (1) 中
硫原子的结合位点)。