Specifications include, but are not limited to: We require the Ultrafast Systems HELIOS FIRE femtosecond transient absorption spectrometer system. This include both the Helios-IR-FIRE and Helios-VIS-FIRE along with upgraded components including the HE-VIS-NIR-FIRE-TO-HE-VIS-FIRE extension, HE-EOS-VIS-NIR-TO-HE-VIS-NIR-F extension, Short wave infrared (SWIR) extension for HELIOS and EOS, HE-UV-FIRE probe generation module for a UV-enhanced continuum, SMART PUMP extension, SURFACE XPLORER data analysis software for analyzing transient absorption/emission data, TO-TOPAS, TO-PROBE, TO-OPA, and TO-OPA-IR transport optics, two TSH-FIRE Motorized, computer controlled translating sample holders, and MCT- 64x2 HgCdTe 64 pixel dual array detector for the Helios-IR transient absorption spectrometer. We have recently been funded by the National Science Foundation (NSF award #OIA-1757220) to perform cutting edge, state of the art femtosecond transient-absorption spectroscopy experiments from the ultraviolet region of the electromagnetic spectrum out to at least 13 um using the Ultrafast Systems HELIOS FIRE femtosecond transient absorption spectrometer system.