An imine linked fluorescent covalent organic cage: the sensing of chloroform vapour and metal ions, and the detection of nitroaromatics

Fluorescent covalent organic cage molecule (F-COC) showed enhanced emission intensity in chloroform solution and polymer matrix film form in presence of chloroform vapours.

Hydrogen Bonding Guests Direct the Packing of a Small Organic Cage Molecule

<div> <p>A small organic cage molecule (<b>1</b>) containing six nitrile groups was crystallized in the presence of a number of guests with hydrogen bond donor groups, and from different solvents. In total, eight crystal structures of <b>1</b> were obtained, six of which are guest-free and two of which are co-crystals. When the guest was resorcinol or pyrogallol co-crystals did not form, but the presence of the guests directed formation of new crystalline phases that were not observed when the cage was crystallized alone. When the guest was hydroquinone or diaminobenzene, it was possible to isolate co-crystals where the guest hydrogen bonds to some of the nitrile groups of the cage. </p> </div> <br>

Hydrogen Bonding Guests Direct the Packing of a Small Organic Cage Molecule

<div> <p>A small organic cage molecule (<b>1</b>) containing six nitrile groups was crystallized in the presence of a number of guests with hydrogen bond donor groups, and from different solvents. In total, eight crystal structures of <b>1</b> were obtained, six of which are guest-free and two of which are co-crystals. When the guest was resorcinol or pyrogallol co-crystals did not form, but the presence of the guests directed formation of new crystalline phases that were not observed when the cage was crystallized alone. When the guest was hydroquinone or diaminobenzene, it was possible to isolate co-crystals where the guest hydrogen bonds to some of the nitrile groups of the cage. </p> </div> <br>

Computational discovery of a large-imine-cage-based porous molecular material and its application in water desalination

Design of both crystalline and amorphous porous molecular solids based on a large imine cage molecule.

Spiro[cyclopentane-1,11′-hexacyclo[7.6.0.01,6.06,13.08,12.010,14]pentadecane]-7′,15′-dione

An unusual rearrangement of spiro cage dione to a trishomocubane derivatives is reported by acid-catalysed rearrangement with the aid of BF3·OEt2 in benzene (solvent) reflux conditions. Here, the molecular structure of cage molecule C19H22O2 (major product) consists of five-membered rings, which adopt an envelope conformation and six-membered rings adopt a chair or boat conformation. The Cremer & Pople puckering parameters of all four six-membered rings are calculated.

Mechanochemical synthesis and crystal structure of a 1:2 co-crystal of 1,3,6,8-tetraazatricyclo[4.3.1.13,8]undecane (TATU) and 4-chloro-3,5-dimethylphenol

Solvent-free treatment of 1,3,6,8-tetraazatricyclo[4.3.1.13,8]undecano (TATU) with 4-chloro-3,5-dimethylphenol led to the formation of the title co-crystal, C7H14N4·2C8H9ClO. The asymmetric unit contains one aminal cage molecule and two phenol molecules linkedviatwo O—H...N hydrogen bonds. In the aminal cage, the N–CH2–CH2–N unit is slightly distorted from asynperiplanar geometry. Aromatic π–π stacking between the benzene rings from two different neighbouring phenol molecules [centroid–centroid distance = 4.0570 (11) Å] consolidates the crystal packing.

Self-organization of dipyridylcalix[4]pyrrole into a supramolecular cage for dicarboxylates

Cis-dipyridylcalix[4]pyrrole formed a supramolecular cage upon dimerization and coordination with Pd(ii). The cage molecule recognised suberate selectively by hydrogen bonding to the two calix[4]pyrroles.

Continuous flow synthesis of a carbon-based molecular cage macrocycle via a three-fold homocoupling reaction

The facile synthesis of the cage molecule (C110H56Br2) via a remarkable three-fold homo-coupling macrocyclization reaction using continuous flow methodology is reported.