Red-light operable photosensitizer with symmetry-breaking charge transfer induced intersystem crossing for polymerization of methyl methacrylate,Chemical Communications

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Red-light operable photosensitizer with symmetry-breaking charge transfer induced intersystem crossing for polymerization of methyl methacrylate
Chemical Communications ( IF 4.3 ) Pub Date : 2024-01-29 , DOI: 10.1039/d3cc06017a
Zafar Mahmood ₁ , Shuqing Cai ₁ , Noreen Rehmat ₁ , Mariangela Di Donato ₂ , Jianzhang Zhao ₃ , Shanshan Sun ₄ , Mingde Li ₄ , Yanping Huo ₁ , Shaomin Ji ₁

Affiliation

We present a red light-activated zinc^II bis(dipyrrin) symmetry breaking charge transfer (SBCT) architecture, showing a large molar absorption coefficient (ε = 15.4 × 10⁴ M⁻¹ cm⁻¹), high reactive singlet oxygen generation efficiency (Φ_Δ ≈ 0.8) and long-lived triplet state (τ_T = 150 μs) compared to the donor–acceptor analogue dipyrrin-BF₂ complex, highlighting the superiority of the SBCT approach. For the first time, we demonstrated the potential of a SBCT scaffold in red-light-induced methyl methacrylate (MMA) polymerization, using a dual photocatalyst excitation approach.

中文翻译：

具有对称破缺电荷转移诱导系统间窜越的红光操作光敏剂，用于甲基丙烯酸甲酯的聚合

我们提出了一种红光激活的锌^II双(联吡啶)对称性破缺电荷转移(SBCT)结构，表现出较大的摩尔吸收系数( ε = 15.4 × 10 ⁴ M ⁻¹ cm ⁻¹ )、高反应性单线态氧生成效率(与供体-受体类似物二吡林-BF ₂复合物相比，具有Φ _Δ ≈ 0.8）和长寿命的三重态（ τ _T = 150 μs），凸显了 SBCT 方法的优越性。我们首次使用双光催化剂激发方法证明了 SBCT 支架在红光诱导甲基丙烯酸甲酯 (MMA) 聚合中的潜力。

更新日期：2024-01-29

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