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Spectral and kinetic fluorescence properties of native and nonisomerizing retinal in bacteriorhodopsin

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Strong Dependence of Quantum-Dot Delayed Luminescence on Excitation Pulse Width

Arianna Marchioro

Delayed luminescence involving charge-carrier trapping and detrapping has recently been identified as a widespread and possibly universal phenomenon in colloidal quantum dots. Its near-power-law decay suggests a relationship with blinking. Here, using coll ...

2017

Push-pull dioxaborine as fluorescent molecular rotor: far-red fluorogenic probe for ligand-receptor interactions

Fluorescent solvatochromic dyes and molecular rotors have attracted considerable attention as fluorogenic probes because of background-free detection of biomolecules in live cells in no-wash conditions. Herein, we introduce a push-pull boron-containing (di ...

Royal Soc Chemistry2016

Drexhage’s Experiment for Sound

Romain Christophe Rémy Fleury

Drexhage’s seminal observation that spontaneous emission rates of fluorophores vary with distance from a mirror uncovered the fundamental notion that a source’s environment determines radiative linewidths and shifts. Further, this observation established a ...

American Physical Society2016

Deep-UV fluorescence lifetime imaging microscopy

Yves Bellouard

A novel fluorescence lifetime imaging microscopy (FLIM) working with deep UV 240-280 nm wavelength excitations has been developed. UV-FLIM is used for measurement of defect-related fluorescence and its changes upon annealing from femtosecond laser-induced ...

Optical Soc Amer2015

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In this work we demonstrate 3D imaging using two-photon excitation through a 20 cm long multimode optical fiber (MMF) of 350 mu m diameter. The imaging principle is similar to single photon fluorescence through a MMF, except that a focused femtosecond puls ...

Optical Soc Amer2015

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Fluorescence cystoscopy enhances detection of early bladder cancer. Water used to inflate the bladder during the procedure rapidly contains urine, which may contain fluorochromes. This frequently degrades fluorescence images. Samples of bladder washout flu ...

Spie-Soc Photo-Optical Instrumentation Engineers2014

A mixture of two amphiphiles with fluorescent head groups can be used as a sensing ensemble for the pattern-based analysis of aminoglycoside antibiotics. In buffered aqueous solution, the amphiphiles form a dynamic mixture of micellar aggregates. In the pr ...

Royal Soc Chemistry2014

Ultraviolet transient absorption, transient grating and photon echo studies of aqueous tryptophan

Majed Chergui, Andrea Cannizzo, Cristina Consani

We compare UV transient grating (TG) experiments of aqueous tryptophan with transient absorption (TA) and fluorescence up-conversion measurements. The TG and TA signals show a bi-exponential rise with sub-ps and ps time constants, which are consistent with ...

Elsevier2013

Pulsed-current versus constant-voltage light-emitting electrochemical cells with trifluoromethyl-substituted cationic iridium(III) complexes

Michael Graetzel, Mohammad Khaja Nazeeruddin, Rosario Scopelliti, Cristina Roldán Carmona

We report on five cationic iridium(III) complexes with cyclometalating 2-(3'-trifluoromethylphenyl)pyridine and a diimine, (C boolean AND N)(2)Ir(N boolean AND N), N boolean AND N = 4,4'-R-2-2,2'-dipyridyl or 4,7-R-2-1,10-phenanthroline (R = H, Me, ...

Royal Society of Chemistry2013

How to blue-shift phosphorescence color of iridium(III) complexes

Michael Graetzel, Mohammad Khaja Nazeeruddin, Rosario Scopelliti

We achieve a 20-58 nm (610-1890 cm (1)) blue-shift of the phosphorescence maximum of iridium(III) complexes (CN)(2)Ir(NN) of 1,10-phenanthrolines (NN) by modifying the cyclometalating 2-phenylpyridine ligand (CN = ppy) with an electron-w ...

2013