cryptand


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cryptand

[′krip‚tand]
(organic chemistry)
A macropolycyclic polyazo-polyether, where the three-coordinate nitrogen atoms provide the vertices of a three-dimensional structure.
References in periodicals archive ?
sensor on this system consists of a macrocyclic ion-selective cryptand covalently coupled to an o-alkoxyaniline fluorophore.
2] cryptand (4,7,13,16,21,24-hexaoxa1 1, 10-diaza-bicyclo[8.
The crown ethers and cryptand used in this study are shown in Fig.
This clearly indicates that the crown ether or cryptand does complex with both potassium or sodium ion and effect an expansion of the d-spacing.
PS-Na-cryptand: polystyrene with sodium clay complexed with cryptand
PS-K-cryptand: polystyrene with potassium clay complexed with cryptand
Syntheses centre on macrocyclic ligands of the crown ether or cryptand type and related complexing agents.
Polyaza macrobicyclic cryptands: synthesis, crystal structures of a cyclophane type macrobicyclic cryptand and of its dinuclear copper(I) cryptate, and anion binding features.
Coverage encompasses cyclophnes; crown ethers, cryptands, and other compounds; calixarenes; heterocalixaresn and calixnaphthalenes; cyclodextrins; cyclotriveratylenes and cryptophnes; cucurbiturils; rotaxanes and catemanes; and other supramolecular systems, molecular motors, machines, and nanotechnological applications.
After dealing with preliminaries he presents a section on moieties within molecules, discussing crown ethers, cryptands, and related molecules as hosts; cyclodextrins and some analogs as hosts; and crystal chemistry of some DNA oligonucleotides and their complexes.
Polyammonium cryptands are bicyclic compounds, which are suitable for encapsulating anion in the cavity center.