New paper on molecular recognition: triazine-carbon nanotubes with Flavin

Carbon nanotubes, both single-walled and multi-walled, have been functionalised with 1,3,5-triazines and p-tolyl chains by aryl radical addition under microwave irradiation and the derivatives have been fully characterised. Artificial receptors in catalytic processes could be designed through specific control of the interaction between functionalised carbon nanotubes and riboflavin. Advertisements

Self-assembly of T-shape 2H-benzo[d][1,2,3]-triazoles. Optical wadeguide and photophysical properties†

T-shaped 2H-benzo[d][1,2,3]triazole derivatives have been synthesized by Sonogashira coupling reactions under microwave irradiation. DFT calculations were performed in order to understand the structure-property relationships – an aspect that is of vital importance for the rational design of organic self-assemblies for optoelectronic applications. Concentration-dependent 1H Pulse Field-Gradient Spin-Echo (PFGSE) NMR spectroscopy and UV/Vis spectrophotometry indicated the … Continue reading

Tunable Emission in Aggregated T-Shaped 2H-Benzo[d][1,2,3]triazoles with Waveguide Behaviour

Symmetrical Donor-Acceptor-Donor (D-A-D) 2H-benzo[d][1,2,3]triazole derivatives have been designed by DFT calculations and prepared by a multistep synthetic protocol. The design strategy involved the identification of a suitable acceptor benzotriazole core and modification of the volume and donor strength of the branches in order to modulate the Intramolecular Charge Transfer (ICT) process and, consequently, the band … Continue reading

Preparation and properties of Triazine based Streptocyanines

A new series of bistriazine-based streptocyanines has been selectively prepared. 1D- and 2D-DNMR spectroscopy and computational calculations have shown the presence of a Cl … H bond. UV–vis and fluorescence spectroscopy show that streptocyanine-based bistriazines are violet-blue emitters and large Stokes shifts of more than 6000 cm−1 were observed. The title compounds showed interesting properties which … Continue reading

SMALL-VOLUME NMR spectroscopy

NMR analysis of mass-limited samples remains a major challenge, which has triggered the development of expensive superconducting ultra-high field magnets, as well as of more expensive and technologically demanding solutions as cryoprobes and hyperpolarization schemes. Mass-limited samples could also benefit from the use of miniaturized coils, since the amplitude of the NMR signal is optimal … Continue reading

Nuevo artículo sobre Triazinas en ciencia de materiales

A series of imine-derived triazines with Donor–Acceptor properties have been designed. They are excellent candidates for the interaction with graphene and the construction of optoelectronic devices, as blue Light Emitting-Diodes.

Un artículo del grupo portada de Chemistry

The stereoselective synthesis of 1,3-diaminotruxillic acid derivatives has been achieved in high yields and short reaction times. The procedure starts from simple 5(4H)- oxazolones and is based on an efficient combination of CH orthopalladation, [2+2]-photocycloaddition on continuous flow microreactors using visible light from LED sources, and hydrogenation to selectively afford the epsilon isomer.  

Solvent-free Microwave Assisted Synthesis of New 2,5-Dimethoxyphenylaminotriazines

A new green synthesis star-shaped 2,5-dimethoxyphenylamino-1,3,5-triazine derivatives using microwave irradiation in the absence of solvent, with properties as donor–acceptor (D–A) systems. is described.

New luminescent blue emitters based on bistriazines

Efficient blue emitters (with ΦF values up to 0.87) bistriazines have been synthesized using Green procedures under microwave irradiation.

Review on the applications of 1,2,4-triazoles in materials Science

The aim of this review is to discuss the most important metal-free derivatives bearing 1,2,4- triazole moieties. Applications in OLEDs, PHOLEDs, PLEDs, liquid crystals, optical waveguides, PEMFCs, organic photovoltaic cells and data storage devices.