Cyclometallated 1,2,3-triazol-5-ylidene iridium(III) complexes: synthesis,structure, and photoluminescence properties

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Photochromic Free MOF‐Based Near‐Infrared Optical Switch

We demonstrate herein an all‐optical switch based on stimuli‐responsive and photochromic‐free metal–organic framework (HKUST‐1). Ultrafast near‐infrared laser pulses stimulate a reversible 0.4 eV blue shift of the absorption band with up to 200 s^?1 rate due to dehydration and concomitant shrinking of the structure‐forming [Cu₂C₄O₈] cages of HKUST‐1. Such light‐induced switching enables the remote modulation of intensities of photoluminescence of single crystals of HKUST‐1 as well visible radiation passing through the crystal by 2 order of magnitude. This opens up the possibility of utilyzing stimuli‐responsive MOFs for all‐optical data processing devices.     

Insights into the reaction paths of copper(i) acetylides with dichloroglyoxime leading to 3,3′-biisoxazoles

Russian Chemical Bulletin - Base-free reaction of dichloroglyoxime with copper(i) acetylides gave 3,3′-biisoxazoles via a nucleophilic substitution of the chlorine atom of dichloroglyoxime...     

Solvent-free telomerization of isoprene with alcohols catalyzed by palladium(ɪɪ) carbene complexes

Russian Chemical Bulletin - The effect of various factors on the activity and selectivity of palladium N-heterocyclic carbene (NHC) complexes in the telomerization of isoprene with alcohols has...     

Photochromic Free MOF-Based Near-Infrared Optical Switch

We demonstrate herein an all-optical switch based on stimuli-responsive and photochromic-free metal–organic framework (HKUST-1). Ultrafast near-infrared laser pulses stimulate a reversible 0.4 eV blue shift of the absorption band with up to 200 s⁻¹ rate due to dehydration and concomitant shrinking of the structure-forming [Cu₂C₄O₈] cages of HKUST-1. Such light-induced switching enables the remote modulation of intensities of photoluminescence of single crystals of HKUST-1 as well visible radiation passing through the crystal by 2 order of magnitude. This opens up the possibility of utilyzing stimuli-responsive MOFs for all-optical data processing devices.     

Arylation of nitromethane with sterically hindered aryl halides

Efficient conditions for Pd-catalyzed cross-coupling of sterically hindered aryl halides with nitromethane were developed to give corresponding aryl nitromethanes. The opportunity to carry out the reaction of polynitromethylation under these conditions was demonstrated, as well as to use the obtained products in the synthesis of bisnitrile oxides.

     

Solvent-free Suzuki and Stille cross-coupling reactions of 4- and 5-halo-1,2,3-triazoles

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Solvent-free and transition metal catalyst-free synthesis of indolo[1,2-f]phenanthridine from 6-chlorophenanthridine

A new easily scalable synthesis of the important for materials chemistry indolo[1,2-f]phenanthridine from commercially available 6-chlorophenanthridine was developed. The suggested transition metal catalyst-free and solvent-free procedure is more ecologically friendly and cost efficient then the known methods. The yields of indolo[1,2-f]phenanthridine synthesized from 6-chlorophenanthridine in three steps were 20% and 26% if the cyclization was carried out solvent-free and in THF in the presence of lithium 2,2,6,6-tetramethylpiperidide, respectively.

     

Solvent-free palladium-catalyzed C–O cross-coupling of aryl bromides with phenols

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