| 释义 |
cryptand, n. Chem.|ˈkrɪptænd|
[f. crypto- + -and2, after *cryptate n.]
An organic bicyclic compound whose molecule contains a cavity capable of holding metal cations.
1975Y. M. Cahen et al. in Jrnl. Physical Chem. LXXIX. 1289/1 Lehn introduced a new class of complexing agents of hexaoxadiamine macrobicyclic type called ‘cryptands’. Ibid. 1291/2 Following the suggestion of Lehn (personal communication) we designate the ligands as cryptands and the corresponding complexes as cryptates. 1977Sci. Amer. July 100/2 In pure ethylamine..sodium is virtually insoluble; when 2,2,2-cryptand is present, several grams of sodium per liter of solvent can be dissolved. 1980Tetrahedron XXXVI. 493 Cryptands..have also been referred to as ‘lanterns’ (the name originally proposed by Pedersen). 1988P. D. Beer in T. E. Edmonds Chem. Sensors ii. 32 Because the cryptand host cavity is three-dimensional and spheroidal in shape, it is well adapted for a ‘ball-like’ guest metal cation. |