🌈 LMCT — LIGAND-TO-METAL CHARGE TRANSFER!
LMCT — elektronning ligand orbitallaridan metall orbitallariga ko'chishi. Kuchli yutilish (ε = 1,000-50,000), intensiv ranglar!
Tarix: Jørgensen (1962), Lever (1968), Gray-Beach (1960-yillar), Solomon (2000-yillar). Knowledge Base: Miessler-Tarr, Cotton-Wilkinson, Ballhausen.
🌈LMCT (Ligand-to-Metal Charge Transfer)
Chuqurlashgan mavzu — Zaryad ko'chishi fenomenlari
LMCT
Ligand-to-Metal Charge Transfer
LMCT — elektronning ligand orbitallaridan metall orbitallariga o'tishi natijasida yuzaga keladigan yutilish jarayoni. Yuqori oksidlanish darajali metallar (Mn⁷⁺, Cr⁶⁺, V⁵⁺) va elektron donor ligandlar (O²⁻, S²⁻, Cl⁻) uchun xos. Kuchli yutilish (ε = 1,000-50,000) → intensiv ranglar.
⚙️LMCT Mexanizmi
Ta'rif
LMCT (Ligand-to-Metal Charge Transfer) — elektronning ligand orbitallaridan metall orbitallariga o'tishi natijasida yuzaga keladigan yutilish jarayoni
Jarayon bosqichlari
Dastlabki holat
Metall yuqori oksidlanish darajasida (Mⁿ⁺), ligand esa elektron donori (L⁻). Ligandning to'ldirilgan orbitallari metallning bo'sh orbitallariga nisbatan yuqori energiyada.
Yorug'lik yutilishi
Qo'zg'algan holat
Relaksatsiya
💡 Zaruriy shartlar
- •Metall yuqori oksidlanish darajasida (Mn⁷⁺, Cr⁶⁺, V⁵⁺)
- •Ligand elektron donori (O²⁻, S²⁻, Cl⁻, Br⁻, I⁻)
- •Metallning bo'sh d-orbitallari mavjud
- •Energiya mosligi (ΔE = 20,000-50,000 cm⁻¹)