Complexes nrog annular lug yog tau los ntawm lub chelating kev txiav txim ntawm lub nplhaib chelating nrog ob los yog ntau tshaj ligands thiab tib lub hlau ions. Kev sib koom tes tuav ntawm ligands thiab hlau ions feem ntau muaj ob hom:
(1) Cov kua qaub (acid) nyob rau ligand dissociated mus rau H thiab ces muab piv nrog cov hlau ions;
Hlau EDTA Chelate
(2) Lub ligand muaj cov nruab nrab ntawm cov khub electron thiab cov hlau.
Ib qho tseem ceeb tshaj plaws ntawm chelate yog nws cov thermodynamic stability thiab thermal stability. Lub txiaj ntsim ntawm chelating ib ncig yog zoo ib yam li cov ntawm aromatic rings. Chelate tuaj yeem ua rau nruab nrab tsis muaj nqi, los yog cov txheej txheem ua kom tsis muaj zog, qhov qub soluble hauv organic tov, qhov tom kawg soluble hauv dej, uas yog siv tau cais tawm thiab tshawb cov hlau ions. Lub hauv paus ntsiab lus ntawm kev tsim chelate los ntawm hlau ions thiab ligands yog txoj kev xav ntawm mos thiab tawv acid thiab alkali, uas yog: tawv thiab tawv, muag.
Lub chelate ntawm hlau ions thiab ntau hom tshuaj tiv thaiv muaj qhov ruaj ntseg siab tshaj qhov uas zoo sib xws ua los ntawm cov hniav ib leeg. Qhov no yog vim hais tias nws yog qhov nyuaj rau disconnect tus neeg sawv cev chelating nrog ob tus yuam sij nyob ntawm tus hlau. Qee cov hlau chelating uas tau los ntawm chelation yog siv dav, piv txwv li, EDTA yog tus tswvcuab 6-tus txha hniav, uas tuaj yeem siv rau dej muag, txuag zaub mov thiab lwm yam; qhov kev sib cais thiab kev tshawb ntawm alkali thiab alkaline lub ntiaj teb hlau los ntawm kev sib tw ligand crown ethers yog tshwj xeeb muaj feem xyuam.
