Excimer

About: Excimer is a research topic. Over the lifetime, 3725 publications have been published within this topic receiving 75104 citations.

Pyrene excimer nucleic acid probes for biomolecule signaling.

Abstract: Pyrene excimer nucleic acid probes are novel molecular probes that integrate the unique optical properties of pyrene excimer with excellent recognition capability of nucleic acids. Pyrene has the property of forming excimer that has a large Stokes shift and long fluorescence lifetime. Nucleic acid probes, like aptamers and molecular beacons, can directly bind to target molecules with a high selectivity and affinity. Possessing these outstanding characteristics of pyrene excimer and nucleic acid probes, pyrene excimer nucleic acid probes can be effectively used in detection of biomolecules, study of protein-DNA interactions, and investigation of enzymatic processes in complex biological systems. In this review, we will discuss the optical properties of pyrene excimer and summarize recent progresses on pyrene excimer signaling nucleic acid probes for the signaling of biomolecules and their interactions in complex biological samples.

Wavelength calibration tool for narrow band excimer lasers

Abstract: An excimer laser system having a precisely calibratable absolute emission wavelength is provided wherein at least one source of reference light is used. The reference light may be a laser such as a HeNe laser or a cathode lamp such as a hollow Pt, As, C, or Fe cathode lamp. The reference light and the excimer laser beam are directed along substantially the same optical path. The beams are broadened and recollimated by beam expanding optics. The broadened beams impinge upon a dispersive element, preferably an echelle grating, and various orders for each incident wavelength are dispersed. The beams are refocused onto a position sensitive detector such as a CCD camera. Different orders of one or more lines of known wavelength of the reference light and a line from the excimer laser emission are also incident at the detector simultaneously. An absolute wavelength calibration of the excimer laser emission is precisely determinable based on a position of said excimer laser emission relative to positions of the one or more lines of the reference light at the detector. The grating constant of the preferred grating and the detector are such that calibration of the central wavelength of the narrowed excimer laser emission is performable when the central wavelength is anywhere within the broadband emission spectrum of the excimer laser. A processor calculates the absolute wavelength of the excimer laser emission. Embodiments are provided for refractive optic, catadioptric, and reflective imaging systems.

Gamma -cyclodextrin-enhanced excimer fluorescence of pyrene and effect of n-butyl alcohol

Abstract: The fluorescence of pyrene has been measured in aqueous solutions in the presence of γ-cyclodextrin. The excimer emission of pyrene was enhanced upon addition of γ-cyclodextrin, indicating the formation of the 2:1 complex of pyrene with γ-cyclodextrin which degraded upon addition of n-butyl alcohol to yield the more stable three-component complex of pyrene, n-butyl alcohol, and γ-cyclodextrin.