例句與造句

1. The first simple enzyme mimics were based on crown ether and cryptand.
2. Structure of a [ 2.2 . 2 ] cryptand encapsulating a potassium cation ( purple ).
3. The use of the cryptand to sequester the potassium ions avoids ion-pairing between free potassium and fluoride ions, rendering the fluoride anion more reactive.
4. The introduction of a special cryptand ligand containing amines instead of ether linkages has allowed the isolation of kalide and natrides that are stable at room temperature.
5. Base hydrolysis removes the acetyl protecting groups, giving the desired product ( "'4 "') after removing the cryptand via ion-exchange:
6. It's difficult to find cryptand in a sentence. 用cryptand造句挺難的
7. Although the molecular shape defines a cage, no void space is available at the interior for binding other atoms or molecules, unlike crown ethers or larger cryptand structures.
8. Normally, alkalides are thermally labile due to the high reactivity of the alkalide anion, which is theoretically able to break most covalent bonds including the C O bonds in a typical cryptand.
9. To achieve this chemistry, the 18 F  " is separated from the aqueous solvent by trapping it on an ion-exchange column, and eluted with an acetonitrile solution of 2, 2, 2-cryptand and potassium carbonate.