In memory of Professor Ugo Mazzucato (1929–2017)
This issue of Photochemistry & Photobiological Sciences is dedicated to the memory of Professor Ugo Mazzucato, who passed away on 15th October 2017.
Photochromic rotaxanes and pseudorotaxanes
Among stimulus-responsive molecular ring-on-thread rotaxanes and pseudorotaxanes, variants incorporating photochromic sub-units are attracting considerable attention as their properties and structure can be remotely and precisely controlled, additionally without producing chemical waste.
Wavelength dependence and wavelength selectivity in photochemical reactions
Our study describes how organic photochemists can modify the outcome of a reaction by tuning the wavelength.
Optimal arrangements of 1,3-diphenylisobenzofuran molecule pairs for fast singlet fission
Best molecular pair packing geometries for singlet fission in 1,3-diphenylisobenzofuran are predicted.
Synthesis, spectroscopy and QM/MM simulations of a biomimetic ultrafast light-driven molecular motor
A molecular motor potentially performing a continuous unidirectional rotation is studied by a multidisciplinary approach including organic synthesis, transient spectroscopy and excited state trajectory calculations.
VUV-photolysis of aqueous solutions of hydroxylamine and nitric oxide. Effect of organic matter: phenol
VUV-irradiation of aqueous solutions containing, both, hydroxylamine (NH2OH/NH3OH+) and phenol results in the mineralization of the organic substrate and the quantitative reduction of NH3OH+ to NH4+ ions.
The photoisomerization of cis,trans-1,2-dideuterio-1,4-diphenyl-1,3-butadiene in solution. No bicycle-pedal
cis,trans-1,2-Dideuterio-1,4-diphenyl-1,3-butadiene (ct-DPBd2) was synthesized and its cis–trans photoisomerization in cyclohexane-d12 (C6D12) at room temperature was monitored by 1H NMR spectroscopy.
Photocatalytic inactivation of Escherichia coli bacteria in water using low pressure plasma deposited TiO2 cellulose fabric
Fabrics obtained from cellulose spinning were coated with TiO2 film, through the low pressure plasma sputtering technique, in order to get antibacterial activity.
Solution and solid state photochromism in a family of shape persistent azobenzene tetramers functionalized with alkyloxy substituents
Shape-persistent azobenzene tetramers functionalized at the periphery with alkyloxy substituents of different lengths have been synthesized and their photochemical behaviour has been investigated.
Optimized synthesis of luminescent silica nanoparticles by a direct micelle-assisted method
Small PEGylated silica nanoparticles are synthesized in the presence of high concentrations of organic solvents. This method allows for the efficient incorporation of dyes with poor solubility in water, yielding bright silica nanoparticles.
Photoelectrocatalytic degradation of emerging contaminants at WO3/BiVO4 photoanodes in aqueous solution
Advantages and limitations of WO3/BiVO4 heterojunctions applied to the photoelectrochemical treatment of some environmental Contaminants of Emerging Concern (CEC).
Effect of the size of polycyclic aryl groups on the competition between adiabatic/diabatic photoisomerization mechanisms of cis-styrylarenes
Adiabatic photoisomerization from 1Z* to 1E* has been experimentally evidenced for several styrylarenes. Its weight on the overall cis–trans photoisomerization has been found to increase upon increasing the chromophore size.
Excited-state intramolecular proton transfer in a bioactive flavonoid provides fluorescence observables for recognizing its engagement with target proteins
Intra- vs. intermolecular hydrogen-bond formation and ESIPT in a bioactive flavonoid result in different emission properties and provide a clue for recognizing its binding to target proteins.
The regioselective [2 + 2] photocycloaddition reaction of 2-(3,4-dimethoxystyryl)quinoxaline in solution
The [2+2] photocycloaddition between two molecules of (E)-2-(3,4-dimethoxystyryl)-quinoxaline (1) in an acetonitrile solution is the first example of the regioselective and stereospecific formation of a cyclobutane derivative without applying any method for the preorganization of molecules in a dilute solution.
Photoinduced oxidation of an indole derivative: 2-(1′H-indol-2′-yl)-[1,5]naphthyridine
UV-induced photooxidation of a 2-substituted indole derivative provides an efficient way for the formation of a benzoxazinone derivative.
The neuroleptic drug fluphenazine induces a significant UVA-mediated cytotoxic effect on three human cancer cell lines through apoptosis
The cytotoxic activity of fluphenazine (FPZ) in combination with UVA light was evaluated on three human tumor cell lines, HeLa, MSTO-211H and A431.
A calixarene-based ternary supramolecular nanoassembly with improved fluoroquinolone photostability and enhanced NO photorelease
A calixarene-based micellar nanoscaffold allows the co-encapsulation of a photolabile fluoroquinolone drug and a poorly photoreactive NO photodonor, simultaneously overcoming the main limitations of the free individual guests such as photolability and low photoreactivity.
Photo-induced spin switching in a modified anthraquinone modulated by DNA binding
The spin state of a nitroxide-labelled anthraquinone can be switched by visible light and modulated by DNA.
The chiral photocycloaddition of a cyclohexenone derivative with a chiral alkene. A DFT study
A theoretical study allows the modification of a previously assigned structure and justify the high stereoselectivity of the reaction.
One- and two-photon absorption properties of quadrupolar thiophene-based dyes with acceptors of varying strengths
The effect of acceptors of varying strengths on the 1P and 2P properties of DAD thiophene based dyes is determined by a combination of experimental and computational methods.
Early photophysical events of a ruthenium(II) molecular dyad capable of performing photochemical water oxidation and of its model compounds
Early events in a water oxidation chromophore-catalyst species are studied; ultrafast energy transfer occurs from the chromophore to the catalytic unit.
Thermally reversible photochromism of dipyrrolylethenes
A robust dipyrrolylethene derivative which undergoes thermally reversible and fatigue resistant photochromic reactions with appropriate fading rates has been designed and synthesized.
About this collection
This commemorative issue is in honour of the memory and achievements of Ugo Mazzucato, as an eminent photochemist, a rigorous teacher and a friendly colleague.
Anna Spalletti, Fausto Ortica and Loredana Latterini (Guest Editors)