Emerging developments in two-dimensional correlation spectroscopy (2D-COS)

Noteworthy new progress in 2D correlation spectroscopy (2D-COS) and its versatile applications for the last two years are compiled in this comprehensive survey review. We report the new and significant concepts of 2D-COS, various 2D-COS software and useful display techniques, and numerous applications of 2D-COS in various external perturbations, analytical methods, and systems. Applications of 2D-COS in fluorescence spectroscopy have noticeably increased, as well as applications of 2D-COS to field closely related to daily life, such as environmental, medical, and food, are greatly increased. 2D-COS is continuously evolving and growing with new developments and successful applications in various scientific fields. Diverse studies using 2D-COS would surely open a new promising way for in-depth studies of various materials and systems in many applications. (C) 2020 Published by Elsevier B.V.