Photochemical & Photobiological Sciences
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Highly sensitive eight-channel light sensing system for biomedical applications
Photochemical & Photobiological Sciences - Tập 19 - Trang 524-529 - 2020
We demonstrate the potential of an eight-channel light sensing platform system,
named Black Box I (BBI), for rapid and highly sensitive measurement of low-level
light using a nonradioactive optical readout. We developed, normalized, and
characterized the photon sensitivities of the eight channels of the BBI using
placental alkaline phosphatase (PLAP) as a model imaging reporter. We found that
the ...
Ultrafast light-induced response of photoactive yellow protein chromophore analogues
Photochemical & Photobiological Sciences - Tập 6 - Trang 780-787 - 2007
The fluorescence decays of several analogues of the photoactive yellow protein
(PYP) chromophore in aqueous solution have been measured by femtosecond
fluorescence up-conversion and the corresponding time-resolved fluorescence
spectra have been reconstructed. The native chromophore of PYP is a thioester
derivative of p-coumaric acid in its trans deprotonated form. Fluorescence
kinetics are reporte...
Stereoselective interaction of ketoprofen enantiomers with β-cyclodextrin: ground state binding and photochemistry
Photochemical & Photobiological Sciences - Tập 10 - Trang 48-59 - 2020
The chiral recognition ability of β-cyclodextrin (β-CyD) vs. S- and R-ketoprofen
(KP) enantiomers has been studied by circular dichroism (CD), isothermal
titration calorimetry (ITC) and NMR. The association constants of the 1 ∶ 1
complexes obtained from CD and ITC titration experiments resulted to be the same
for both enantiomers within the experimental uncertainty. Well differentiated CD
spectra ...
Synthesis and photophysical properties of pyridyl conjugated triazole appended naphthalenediimide derivatives
Photochemical & Photobiological Sciences - Tập 18 - Trang 1333-1341 - 2020
A series of three substituted triazole appended NDI-derivatives,
2,7-bis(3,5-di(pyridin-X-yl)-4H-1,2,4-triazol-4-yl)benzo[lmn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetraone
(where X = 2, NDI-PyTz-1; 3, NDI-PyTz-2; and 4, NDI-PyTz-3), were designed,
synthesized and well characterized using various analytical and spectroscopic
techniques. All the three NDI-PyTz derivatives exhibit decent electronic
pro...
Investigation of the photoisomerisation process in four p-benzoxazoyl-substituted stilbenes
Photochemical & Photobiological Sciences - Tập 9 - Trang 357-364 - 2010
Fluorescence properties and trans-cisphotoisomerisation of the benzoxazole
derivatives 2-[4-(E)-(styryl)phenyl]benzoxazole (I),
2-{4-[(E)-2-(4-methoxyphenyl)vinyl]phenyl}benzoxazole (II),
{4-[(E)-2-(4-benzoxazol-2-yl-phenyl)vinyl]phenyl}dimethylamine (III) and
{4-[(E)-2-(4-benzoxazol-2-yl-phenyl)vinyl]phenyl}diphenylamine (IV) have been
investigated in solvents of different polarities. It was foun...
ER stress, autophagy and immunogenic cell death in photodynamic therapy-induced anti-cancer immune responses
Photochemical & Photobiological Sciences - Tập 13 - Trang 474-487 - 2014
Tumours are a form of pseudo-organs with their own microenvironment where the
cancer cells nurture a dysfunctional immune environment incapable of inciting
anti-tumour immunity. It had been proposed that the only way to counteract such
an immune system dysfunction in tumours is by eliciting, therapeutically, a
cancer cell death pathway that is accompanied by high immunogenicity and
possibly inhibi...
Quenching of the fluorescence of pterin derivatives by anions
Photochemical & Photobiological Sciences - Tập 3 - Trang 167-173 - 2004
Steady-state and time-resolved studies of the fluorescence of pterins in aqueous
solutions in the presence of different anions have been performed using the
single-photon counting technique. In the pH range between 3 and 13, most pterins
exist in a protonated and a deprotonated form. Results obtained for both acid
and basic forms of five compounds belonging to the pterin family (pterin,
6-carboxyp...
Temperature dependence of the flash duration of the firefly Luciola praeusta
Photochemical & Photobiological Sciences - Tập 13 - Trang 1788-1792 - 2014
Firefly flashing has attracted the attention of both poets and scientists for
over a century. Here we study the effect of temperature on the flash duration of
the Indian species of the firefly Luciola praeusta Kiesenwetter 1874
(Coleoptera: Lampyridae: Luciolinae). Recording in vivo time-resolved spectra of
specimens of this species of firefly over the temperature range 20 °C-40 °C, it
is observed...
Novel luminescent hybrids by incorporating rare earth β-diketonates into polymers through ion pairing with an imidazolium counter ion
Photochemical & Photobiological Sciences - - 2013
A series of luminescent polymers are synthesized by incorporating rare earth
complex units into polymer matrices. Firstly, we functionalize the selected
polymer matrices with the imidazolium moieties, and then introduce the rare
earth tetrakis(β-diketonate) complexes into polymer matrices through a mild
anion exchange method. The resulting materials are characterized by FTIR, XRD,
EDAX, SEM, therm...
Poly(butyl cyanoacrylate) nanoparticle containing an organic photoCORM
Photochemical & Photobiological Sciences - Tập 18 - Trang 2666-2672 - 2020
Carbon monoxide (CO) is a gasotransmitter, which has shown therapeutic effects
in recent studies. Photo carbon monoxide releasing molecules (PhotoCORMs) allow
the delivery of CO to be controlled by light. In this work, a new organic
photoCORM DK4 is studied. DK4 is a diketone type photoCORM, which releases two
CO molecules under visible light and simultaneously generates a fluorescent
anthracene d...
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