Probing with randomly interleaved pulse train bridges the gap between ultrafast pump-probe and nanosecond flash photolysis

T Nakagawa, K Okamoto, H Hanada, R Katoh - Optics Letters, 2016 - opg.optica.org
Despite the long-standing importance of transient absorption (TA) spectroscopy, many
researchers remain frustrated by the difficulty of measuring the nanosecond range in a wide …

Photostability of fluorescent dyes for single-molecule spectroscopy: mechanisms and experimental methods for estimating photobleaching in aqueous solution

W Rettig, B Strehmel, S Schrader, H Seifert… - Applied fluorescence in …, 1999 - Springer
Laser-induced fluorescence detection is used for various ultrasensitive analytical techniques
in chemistry, biology, and medicine by probing reagents that are either autofluorescing or …

Photochromism and proton transfer reaction cycle of new internally H-bonded Schiff bases

A Grabowska, K Kownacki, J Karpiuk, S Dobrin - Chemical physics letters, 1997 - Elsevier
A family of new Schiff bases, derivatives of hydroquinone, has been synthesized. Their
synthesis, spectroscopy and photophysics are reported. Two molecules, having one or two …

A kinetic description of dioxygen motion within α-and β-subunits of human hemoglobin in the R-state: geminate and bimolecular stages of the oxygenation reaction

SV Lepeshkevich, J Karpiuk, IV Sazanovich… - Biochemistry, 2004 - ACS Publications
Laser flash photolysis technique is used to study human hemoglobin (HbA) oxygenation.
Monomolecular geminate oxygenation of triliganded R-state HbA molecules is described by …

Dual fluorescence from two polar excited states in one molecule. Structurally additive photophysics of crystal violet lactone

J Karpiuk - The Journal of Physical Chemistry A, 2004 - ACS Publications
Crystal violet lactone (CVL) emits in aprotic solvents at room temperature single (A band,
low polar solvents) or dual (A and B bands, medium and highly polar solvents) fluorescence …

The kinetics of molecular oxygen migration in the isolated α chains of human hemoglobin as revealed by molecular dynamics simulations and laser kinetic …

SV Lepeshkevich, SA Biziuk, AM Lemeza… - … et Biophysica Acta (BBA …, 2011 - Elsevier
Bimolecular and geminate molecular oxygen (O2) rebinding to isolated α chains of human
adult hemoglobin in solutions is analyzed. Multiple extended molecular dynamics (MD) …

Combined effect of hydrogen bonding interactions and freezing of rotameric equilibrium on the enhancement of photostability

B Golec, K Nawara, A Gorski, RP Thummel… - Physical Chemistry …, 2018 - pubs.rsc.org
The photophysics and photostability of 12, 13-dihydro-5H-indolo [3, 2-c] acridine (IA), a rigid
bifunctional indole derivative with proton donor/acceptor functionalities, can be drastically …

Determination of triplet formation efficiency from kinetic profiles of the ground state recovery

B Lament, J Karpiuk, J Waluk - Photochemical & Photobiological …, 2003 - pubs.rsc.org
A procedure is presented which allows determination of the triplet formation efficiency from
the analysis of transient ground state bleaching curves obtained after short laser pulse …

Photoinduced electron transfer in malachite green lactone

J Karpiuk - Physical Chemistry Chemical Physics, 2003 - pubs.rsc.org
The spectroscopy and photophysics of malachite green lactone (MGL), a lactonic form of the
well-know malachite green dye, have been studied as functions of solvent polarity in aprotic …

Spectroscopy and Photophysics of a Highly Nonplanar Expanded Porphyrin: 4, 9, 13, 18, 22, 27‐Hexaethyl‐5, 8, 14, 17, 23, 26‐hexamethyl‐2, 11, 20‐triphenylrosarin

B Lament, J Dobkowski, JL Sessler… - … A European Journal, 1999 - Wiley Online Library
Nonplanarity and conformational flexibility of alkyl‐and phenyl‐substituted rosarin (see
diagram) determine its photophysical properties. Both neutral and protonated forms are …