一價銅量子產率的測定，對於評估天然水系統中二價銅與多種有機配位基所形成錯合物的光反應性極其重要。在25 °C下，透過改變除氧水溶液中的pH值、總羥基酸濃度與總二價銅濃度等廣泛的實驗條件，系統性地研究配位基結構對於銅羥基酸錯合物系統光生成一價銅的效應。於波長為313 nm的光照射下，銅羥基酸錯合物經由配位基-金屬電荷轉移躍遷(LMCT)誘導一價銅的生成。個別銅羥基酸錯合物於313 nm的莫耳吸收係數與一價銅的量子產率，主要是利用計算的平衡二價銅形態表徵，其中也考慮共存的無機銅物種。使用多元線性回歸分析測定1:1 (CuL)與1:2 (CuL2)的銅羥基酸錯合物生成一價銅的量子產率。CuL的一價銅量子產率(ΦCu(I),CuL)遵循以下趨勢：2-羥基異丁酸(0.432 ± 0.228) > 乳酸(0.296 ± 0.168) > 乙醇酸(0.142 ± 0.099)，而CuL2的一價銅量子產率(ΦCu(I),CuL2)也依循相同趨勢：2-羥基異丁酸(0.617 ± 0.118) > 乳酸(0.328 ± 0.065) > 乙醇酸(0.212 ± 0.041)。這些結果顯示，ΦCu(I),CuL與ΦCu(I),CuL2的數值隨著羥基酸中α-位置的碳原子所接的甲基數量增加而增大。此相對光反應性的趨勢與源自羥基酸的羥烷自由基(α-hydroxyalkyl radicals)所預期相對穩定性的趨勢一致。此外，由個別銅錯合物光生成甲醛、乙醛與丙酮的量子產率也被初步測定。對於銅乙醇酸系統而言，CuL與CuL2的甲醛量子產率為0.069 ± 0.041與0.114 ± 0.019。對於銅乳酸系統而言，CuL與CuL2的乙醛量子產率為0.154 ± 0.108與0.187 ± 0.048。對於銅2-羥基異丁酸系統而言，CuL與CuL2的丙酮量子產率為0.198 ± 0.080與0.341 ± 0.039。CuL2的量子產率始終大於CuL，其可歸因於α-羥基可穩定錯合物的激發態，有利於進行LMCT躍遷。對於CuL和CuL2，Cu(I)和這些羰基產物的個別量子產率的比例約為2。在此也提出這些所觀察光產物的光化學反應機制。

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