Qhov sib txawv tseem ceeb ntawm cov txheej txheem sab hauv thiab sab nraud yog qhov hloov pauv sab hauv sab hauv hluav taws xob tshwm sim ntawm cov txheej txheem ntawm kev sib txuas ntawm ligands, qhov sib txawv ntawm sab nraud electron hloov tshuab tshwm sim ntawm cov complexes uas tsis hloov pauv.
Sab hauv thiab sab nraud sphere electron hloov tshuab yog ob txoj kev txwv ntawm kev hloov hluav taws xob. Cov txheej txheem no piav qhia txog cov tshuaj tiv thaiv redox ntawm kev sib koom ua ke.
Dab tsi yog Inner Sphere Mechanism?
Sab hauv sphere mechanism ntawm kev hloov hluav taws xob yog cov tshuaj tiv thaiv redox uas tshwm sim los ntawm kev sib txuas ntawm cov oxidant thiab reductant reactant ntawm cov tshuaj tiv thaiv. Ntawm no, ib lub ligand txuas cov oxidant thiab reductant reactants thaum lub sij hawm cov tshuaj tiv thaiv. Txawm li cas los xij loj ligands inhibit qhov kev tshwm sim no. Qhov no yog vim tias cov ligands loj no tuaj yeem tiv thaiv cov tshuaj tiv thaiv los ntawm kev tsim cov kev sib txuas tseem ceeb nruab nrab. Yog li ntawd, hom kev hloov pauv hluav taws xob no tsis tshua muaj nyob hauv cov tshuab lom neeg. Feem ntau, cov txheej txheem no muaj txiaj ntsig zoo hauv kev piav qhia txog kev hloov pauv ntawm cov hlau ua haujlwm.
Outer Sphere Mechanism yog dab tsi?
Sphere sphere mechanism ntawm electron hloov pauv yog tshuaj lom neeg cov tshuaj tiv thaiv uas cov reactants thiab cov khoom muaj nyob sib cais ntawm ib leeg ua ntej, thaum lub sij hawm thiab tom qab qhov kev tshwm sim ntawm electron hloov. Tsis zoo li nyob rau hauv lub puab kheej kheej mechanism, tsis muaj kev sib txuas ntawm cov reactants nyob rau hauv sab nraud mechanism. Yog li ntawd, qhov kev hloov hluav taws xob no tshwm sim yam tsis muaj kev cuam tshuam ntawm kev sib koom tes.
Daim duab 01: Redox Reactions rau Fe4S4 Pawg
Nyob rau hauv lub tshuab no, cov electrons raug yuam kom txav los ntawm ib qho chaw redox mus rau lwm qhov los ntawm qhov chaw. Tsis tas li ntawd, cov txheej txheem sab nrauv ntawm kev hloov hluav taws xob yog lub hauv paus ntawm kev ua haujlwm lom neeg ntawm cov hlau-sulfur proteins.
Qhov txawv ntawm Sab hauv thiab Sab Nrauv Sphere Mechanism yog dab tsi?
Sab hauv thiab sab nraud ntawm lub tshuab hluav taws xob hloov pauv piav qhia txog cov tshuaj tiv thaiv redox ntawm kev sib koom ua ke. Qhov sib txawv tseem ceeb ntawm sab hauv thiab sab nrauv kheej kheej yog qhov kev hloov pauv hauv sab hauv hluav taws xob tshwm sim ntawm cov txheej txheem ntawm kev sib txuas ntawm ligands, whereas lub sab nraud electron hloov tshuab tshwm sim ntawm cov complexes uas tsis hloov pauv. Internal sphere mechanism ntawm electron hloov yog tsis tshua muaj nyob rau hauv biological systems, tab sis cov txheej txheem sphere yog ntau.
Cov hauv qab no infographic muab cov ntsiab lus ntxiv ntawm qhov sib txawv ntawm cov txheej txheem sab hauv thiab sab nraud.
Summary – Inner vs Outer Sphere Mechanism
Sab hauv thiab sab nraud ntawm lub tshuab hluav taws xob hloov pauv piav qhia txog cov tshuaj tiv thaiv redox ntawm kev sib koom ua ke. Qhov sib txawv tseem ceeb ntawm cov txheej txheem sab hauv thiab sab nraud yog qhov kev hloov pauv sab hauv sab hauv hluav taws xob tshwm sim ntawm cov complexes ntawm bridging ligands whereas sphere electron hloov mechanism tshwm sim ntawm complexes uas tsis hloov pauv.
