Search Results - "Turek, Andrzej M"

Searching for Alternatives to the Savitzky–Golay Filter in the Spectral Processing Domain by Kałka, Andrzej J., Turek, Andrzej M.

“…An elegant, well-established effective data filter concept, proposed originally by Abraham Savitzky and Marcel J.E. Golay, is undoubtedly a very effective…”
Get full text

Do Spectra Live in the Matrix? A Brief Tutorial on Applications of Factor Analysis to Resolving Spectral Datasets of Mixtures by Kałka, Andrzej J., Turek, Andrzej M.

“…In spite of a rapid growth of data processing software, that has allowed for a huge advancement in many fields of chemistry, some research issues still remain…”
Get full text

Compensation of temperature effects on spectra through evolutionary rank analysis by Kałka, Andrzej J., Turek, Andrzej M.

“…Spectra measured in various ranges of temperature are usually slightly different from each other in shape and position of the bands. Although the displayed…”
Get full text

A new ingenious combination of rank annihilation factor analysis (RAFA) and self-modeling to enhance the unambiguous resolution of multicomponent spectra by Kałka, Andrzej J., Tarka, Eryk G., Turek, Andrzej M.

“…[Display omitted] •A novel approach for multicomponent curve resolution issue is presented.•Data dimensionality reduction is introduced.•Ambiguity of solutions…”
Get full text

Resolution of Three Fluorescence Components in the Spectra of all-trans-1,6-Diphenyl-1,3,5-hexatriene under Isopolarizability Conditions by Turek, Andrzej M, Krishnamoorthy, Govindarajan, Sears, Donald F, Garcia, Ivelitza, Dmitrenko, Olga, Saltiel, Jack

“…all-trans-1,6-Diphenyl-1,3,5-hexatriene (DPH) fluorescence in solution consists of emissions from the S1 (21Ag) and S2 (11Bu) states of the s-trans,s-trans…”
Get full text

Conformer-Specific Photoconversion of 25-Hydroxytachysterol to 25-Hydroxyprevitamin D3:  Role in the Production of Vitamin Ds by Saltiel, Jack, Cires, Lenuta, Turek, Andrzej M

“…The photochemical goal in the production of vitamin Ds (Vit Ds) is to maximize the conversion of the provitamins (Pros) to the previtamins (Pres) while…”
Get full text

Fast Decomposition of Three-Component Spectra of Fluorescence Quenching by White and Grey Methods of Data Modeling by Kałka, Andrzej J., Turek, Andrzej M.

“…‘White’ and ‘grey’ methods of data modeling have been employed to resolve the heterogeneous fluorescence from a fluorophore mixture of 9-cyanoanthracene (CNA),…”
Get full text

Infrared Spectroscopy and Born–Oppenheimer Molecular Dynamics Simulation Study on Deuterium Substitution in the Crystalline Benzoic Acid by Gług, Maciej, Brela, Mateusz Z., Boczar, Marek, Turek, Andrzej M., Boda, Łukasz, Wójcik, Marek J., Nakajima, Takahito, Ozaki, Yukihiro

“…In this study we present complementary computational and experimental studies of hydrogen bond interaction in crystalline benzoic acid and its deuterated and…”
Get full text

π–π-Induced aggregation and single-crystal fluorescence anisotropy of 5,6,10b-triazaacephenanthrylene by Ostrowska, Katarzyna, Ceresoli, Davide, Stadnicka, Katarzyna, Gryl, Marlena, Cazzaniga, Marco, Soave, Raffaella, Musielak, Bogdan, Witek, Łukasz J., Goszczycki, Piotr, Grolik, Jarosław, Turek, Andrzej M.

“…The structural origin of absorption and fluorescence anisotropy of the single crystal of the π-conjugated heterocyclic system 5,6,10b-triazaacephenanthrylene,…”
Get full text

Resolution of Conformer-Specific All-trans-1,6-diphenyl-1,3,5-hexatriene UV Absorption Spectra by Turek, Andrzej M, Saltiel, Jack, Krishna, Tallapragada R. S, Krishnamoorthy, Govindarajan

“…All-trans-1,6-diphenyl-1,3,5-hexatriene (ttt-DPH) exists in solution as a mixture of s-trans,s-trans and s-cis,s-trans conformers. The latter is higher in…”
Get full text

π-π-Induced aggregation and single-crystal fluorescence anisotropy of 5,6,10b-tri-aza-acephenanthrylene by Ostrowska, Katarzyna, Ceresoli, Davide, Stadnicka, Katarzyna, Gryl, Marlena, Cazzaniga, Marco, Soave, Raffaella, Musielak, Bogdan, Witek, Łukasz J, Goszczycki, Piotr, Grolik, Jarosław, Turek, Andrzej M

“…The structural origin of absorption and fluorescence anisotropy of the single crystal of the π-conjugated heterocyclic system…”
Get full text

Acidic properties of alumina-supported metal oxide catalysts: an infrared spectroscopy study by Turek, Andrzej M, Wachs, Israel E, DeCanio, Elaine

Get full text

Photoisomerization of cis-1-(2-Naphthyl)-2-phenylethene in Methylcyclohexane at 77 K:  No Hula-Twist by Saltiel, Jack, Krishna, Tallapragada S. R, Turek, Andrzej M

“…The cis−trans photoisomerization of cis-1-(2-naphthyl)-2-phenylethene ( c -NPE A and c -NPE B ) was studied in methylcyclohexane glass at 77 K. The progress of…”
Get full text

Resolution of Benzophenone Delayed Fluorescence and Phosphorescence with Compensation for Thermal Broadening by Turek, Andrzej M, Krishnamoorthy, Govindarajan, Phipps, Kathleen, Saltiel, Jack

“…Principal component analysis with self-modeling based on the van't Hoff equation constraint was applied to a set of benzophenone luminescence spectra from…”
Get full text

Exploring rotational isomerism of fluorescent diarylethenes comprising 2-naphthyl and regioisomeric oxazoyl groups. A combined experimental and computational study by Kałka, Andrzej J., Ręka, Paweł, Grolik, Jarosław, Ostrowska, Katarzyna, Turek, Andrzej M.

“…•Three regioisomers of n-(2-(naphthalen-2-yl)vinyl)oxazole molecule are synthesized.•Electronic (UV–Vis) and NMR spectra are measured for the studied…”
Get full text

Comment on ‘On Saltiel's isopolarizability approach and its applicability to diphenylpolyenes’ by J. Catalán, Chem. Phys. Lett. 635 (2015) 56–59 by Saltiel, Jack, Turek, Andrzej M.

“…Resolved ttt-DPH fluorescence and absorption spectra from [12] and [13], respectively. This is in response to Catalán's objection to our use of…”
Get full text

Distortion of the Fluorescence Spectrum of Anthracene with Increasing Laser Pulse Excitation Energy by del Valle, Juan Carlos, Turek, Andrzej M, Tarkalanov, Nikolay D, Saltiel, Jack

“…An anthracene solution in cyclohexane was subjected to continuous 354 nm laser pulse excitation under conditions that lead to amplified spontaneous emission…”
Get full text

A novel algorithm for resolution of three-component mixtures of fluorophores by fluorescence quenching by Witek, Łukasz J., Turek, Andrzej M.

“…The article presents a new algorithm for resolving the fluorescence spectra of three-component systems. The proposed method refers to a technique already known…”
Get full text

Fluorescence excitation spectra of all-trans-1,6-diphenylhexatriene conformers: Adiabatic conformer equilibration in the 21Ag state by Turek, Andrzej M., Krishna, Tallapragada S.R., Brela, Mateusz, Saltiel, Jack

“…•The fluorescence excitation spectra of all-trans-1,6-diphenyl-1,3,5-hexatriene conformers were resolved.•The resolved spectra are very similar and differ…”
Get full text

A Raman and ultraviolet diffuse reflectance spectroscopic investigation of silica-supported molybdenum oxide by Williams, Clark C, Ekerdt, John G, Jehng, Jih Mirn, Hardcastle, Franklin D, Turek, Andrzej M, Wachs, Israel E

“…Laser Raman spectroscopy (LRS) and ultraviolet-visible diffuse reflectance spectroscopy (UVDRS) were used to characterize silica-supported, hydrated molybdenum…”
Get full text