Amino-substituted maleimides form a new class of highly emissive compounds, with large Stokes shifts (>100 nm) and high quantum yields (up to ∼60%). Emission is responsive to the maleimide's environment with both a red-shift, and quenching, observed in protic polar solvents. Aminomaleimides are easily functionalised, providing a versatile fluorescent probe.

For an N-protic acid–base system, the set of nonlinear equations (i.e., mass action and balance laws) provides a simple analytical solution/formula for any integer N ? 1. The approach is applicable general case zwitterionic acids HNA+Z (e.g., amino acids, NTA, EDTA), which includes (i) “ordinary acids” as special (Z = 0) (ii) surface complexation. Examples are presented 1 to 6. high-N perspecti...

Aromatic oligoamide sequences able to fold into single helical capsules were functionalized with two types of side chains to make them soluble in various solvents such as chloroform, methanol or water and their propensity to recognize tartaric acid was evaluated. The binding affinities to tartaric acid and binding thermodynamics in different media were investigated by variable temperature (1)H ...

When processing lignocellulosic biomass materials to obtain platform molecules such as levulinic acid (LA), alkyl levulinates or ?-valerolactone (GVL), the choice of solvent is prime importance for kinetics. The knowledge relationships between reaction kinetics and serves a decision tool process design. To determine relationships, esterification reactions was chosen because steps are present in...

Metals are common electrocatalysts for N 2 -into-NH 3 reduction. In protic media, H + competes with to be reduced into . NO x , air pollutants, predicted more selectively converted NH than and even

Arylboronic acids are commonly used in modern organic chemistry to form new C–C and C–heteroatom bonds. These activated synthons show reactivity with heteroatoms a range of substrates under ambient oxidative conditions. This broad has limited their use protic, renewable solvents like water, ethanol, methanol. Here, we report our efforts study optimize the activation arylboronic by copper(II) N-...

Few-layer nitrogen-doped graphene has been prepared via fast and controlled electrochemical exfoliation of graphite in a protic ionic liquid ethylammonium nitrate. The method presents a potentially scalable approach for preparation of metal-free, N-doped graphene for use as electrocatalysts for oxygen reduction reactions.

An efficient functionalization of diaryltetrahydrofurans via a regioselective THF-directed ortho-lithiation is first described. This reaction can be successfully carried out in cyclopentyl methyl ether as a "greener" alternative to Et2O, with better results in terms of yield and selectivity and, surprisingly, also in protic eutectic mixtures competitively with protonolysis.

The solvatochromic fluorescence properties of 8-(phenylamino)-l-naphthalene-ammoniumsulfonate (1) were investigated in 22 pure solvents of rising polarity. The measurements of both Stokes’ shifts and intensities discriminated between protic and aprotic solvents. Fairly good linear correla­ tion plots of the dependence could be obtained on neglection of the values of tert.-butanol, D M F and DM SO.