The latter is due to the syn-N1 conformer formed via ultrafast proton transfer of the syn-N3. The excited state of syn-N1 has a peculiar nonplanar conformation over the purine molecule, which is responsible for the substantial Stokes shift showed in the fluorescence spectrum and correlates with a large energy barrier for nonradiative decay likely involving a reversed proton transfer. This study demonstrates the importance of protonation and solvent environment in altering dramatically the excited states of Ado, providing insight for better understanding nonradiative dynamics of both the monomeric bases and the oligomeric or polymeric DNAs.Correction for 'Vescalagin and castalagin reduce the toxicity of amyloid-beta42 oligomers through the remodelling of its secondary structure' by Ana R. Araújo et al., Chem. Commun., 2020, 56, 3187-3190, DOI .Plant-based drinks as a substitute for animal milk consumption are crucial products in the food industry. Soy and rice drinks are the most successful milk substitutes but are low in fiber and protein contents, respectively, whilst being rich in sugars. Generally, an improvement is foreseen; thus, apart from supplement addition, a natural occurring strategy is functionalizing the drinks by beneficial bacteria fermentation. The aim of this work is to develop novel plant-based drinks assessing different mixtures of soy and rice milks fermented with single or multi-strain probiotics (Lactobacillus fermentum, L. plantarum, L. helveticus, Bifidobacterium bifidum, and B. longum). https://www.selleckchem.com/products/iacs-010759-iacs-10759.html The drinks were characterized to study bacterial performances, by means of culture-dependent and -independent techniques, and their volatilome, by means of solid-phase microextraction-gas chromatography-mass spectrometry (SPME-GC-MS) analysis. Through multivariate analysis, these features were investigated and correlated to define accurate descriptors of the produced functional drinks. The results showed that combined drinks and multi-strain fermentation generated higher-value products. For example, combined drinks in comparison with single ones had a lower amount of toxic 2-acetyl-3,5-dimethylfuran and higher abundances of desirable compounds such as 2-butanone, 3-hydroxy and butanoic acid. Multivariate analysis of volatile metabolites and physiological parameters could offer a novel approach to assess the quality of functional plant-based drinks and result in a decisional tool for industrial applications.A new type of 2D metal-organic framework (MOF), namely Cu-MOF, was constructed from Cu(NO3)2·3H2O and the novel ligand 1,4-bis(4-naphthoic acid)benzene. The C-Hπ interactions in the Cu-MOF effectively reduced aggregation-caused quenching (ACQ) due to restrictions in intramolecular motion (RIM), increased fluorescence, and controlled crystal packing properties, resulting in low dimensional parallelogram channels and a responsive "turn-on" fluorescence. The activated Cu-MOF exhibited excellent chemical sensing properties to various volatile organic compounds (VOCs) and showed excellent recyclability.Stabilizing lithium deposition and reducing excess lithium are the key factors to realize the practicability of lithium-metal batteries. Here, we construct an anode-free full battery, in which Ag coated three-dimensional Cu foam (Ag@3D-Cu) is applied as a lithiophilic current collector to regulate the lithium deposition while the Li2S-based electrode is used as a cathode to avoid excess lithium.Since the complicated multiple electron transfer process and slow kinetics in the OER process seriously hinder the electrochemical decomposition of water, it is urgent to design and develop electrocatalysts with excellent performance and superior stability to reduce overpotential and accelerate the reaction dynamics of the OER. Herein, a unique ultra-thin nanosheet bimetal electrocatalyst NiFe-MOF/IF was synthesized by a one-step hydrothermal method, and characterized by SEM, XRD, TEM, and XPS. NiFe-MOF/IF shows superior OER electrocatalytic activity in 1 M KOH electrolyte solution, and an ultralow overpotential of only 230 and 262 mV was required to achieve a current density of 10 and 100 mA cm-2, respectively, with a relatively small Tafel slope of 30.46 mV dec-1 for the OER. No obvious degradation of the current density at 10 mA cm-2 was observed over about 16 h, which indicates the excellent stability of the catalyst. Favourable activity and benign durability of NiFe-MOF/IF can be attributed to the three-dimensional high porosity conductive substrates, in situ growth of MOF nanosheets, bimetallic synergy, and unique layering. This research provides a promising strategy for the application of MOF materials in the field of electrocatalysis.A new Ni(ii) complex [NiL] (complex 1) of an asymmetrically di-condensed N2O3 donor Schiff base ligand, N-salicylidene-N'-3-methoxysalicylidene-1,3-propanediamine (H2L), has been synthesized and utilized for the synthesis of three heterometallic complexes, [(NiL)2Mn(NCS)2(CH3OH)2]·CH3OH (2) [(NiL)2Mn(N(CN)2)2(CH3OH)2]·CH3OH (3) and [(NiL)2Mn2(N3)2(μ1,1-N3)2(CH3OH)2] (4). Single crystal X-ray diffraction analyses show that complexes 2 and 3 have linear trinuclear structures where two tridentate O3 donor (NiL) units are coordinated to the central octahedral Mn(ii) centre, whereas complex 4 has a centrosymmetric tetranuclear structure where two binuclear (NiL)Mn units are linked via two phenoxido and two μ1,1-N3 bridges. Among the heterometallic complexes (2-4), only 4 is active towards the catalytic oxidation of 3,5-di-tert-butylcatechol to the corresponding quinone. The turnover number for the aerobic oxidation of 3,5-DTBC is 935 h-1. ESI-mass spectra have been recorded to scrutinize the mechanistic pathway of this catalytic reaction. Variable temperature magnetic susceptibility measurements suggest that complexes 2-4 are antiferromagnetically coupled with coupling constants (J) of -4.84 and -5.23 cm-1 for complexes 2 and 3, respectively and J1 = -2.20 cm-1, J2 = 1.13 cm-1 and J3 = -1.12 cm-1 for complex 4. DFT calculations have been used to rationalize the magnetic super-exchange in complexes 2-4, by computing the theoretical coupling constants and analyzing the spin density plots.