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The structural morphology and spectra characteristic of ofloxacin (OFL) was strongly affected by the pH. In strong acidic solutions, OFL molecule exists as strong cation to achieve a weaker intensity. When the pH value increased to 3-4, OFL molecule exists as zwitterions, which is the strongest fluorescence form to have maximum intensity; the maximum exciting and emission wavelength of OFL were 298...
This paper presents the assessment of three spectroscopic techniques, i.e., Raman spectroscopy (RS), ultraviolet fluorescence (UVF) spectroscopy, and energy-dispersive X-ray diffraction (ED-XRD), for measuring calcite (CaCO3) concentration in copper ore. The results for the three methods are compared in terms of their correlation coefficient R2 and prediction error (root-mean-square error of prediction,...
We report on the design and implementation of a fluorescence measurement and analysis device that can identify fluorophore substances. The device performs multi-spectral fluorescence measurements, obtained by exciting the unknown substance with light emitting diodes (LED) whose intensity is CDMA coded for noise rejection. The acquired fluorescence data are processed by a CDMA receiver and a neural...
Conjugated polymer based on thiophene having high reasonably quantum yield has been synthesized. A bulky butoxycarbonylmethyl urethane moiety as a side group is attached to the polymer backbone. The polymer is characterized by 1H NMR, FT-IR, UV-Visible absorption and fluorescence spectroscopy. Thin film fluorescence sensors based on this material were fabricated through a spin-coating technique. The...
Hematoporphyrin monomethyl ether (HMME) that is the second generation photosensitizers is a new and promising porphyrin related photosensitizer for photodynamic therapy and diagnosis in certain tumor. The binding of HMME to bovine serum albumin (BSA) in aqueous solution was studied using fluorescence spectra and absorption spectra. It was shown that HMME has a powerful ability to quench the BSA fluorescence...
In this paper spectroscopic characteristics of two new carbosilane polymers 1 and 2 containing anthracene and acetylene units in their main chain is discussed. To investigate excitation energy migration along the polymeric chain we have measured the fluorescence polarization characteristics
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