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Functionalized Donor–π–Acceptor (D–π–A) Organic Linkers for Metal–Organic Frameworks with Extended Visible‐Light Absorption
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Functionalized Donor–π–Acceptor (D–π–A) Organic Linkers for Metal–Organic Frameworks with Extended Visible‐Light Absorption
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Journal Article
Functionalized Donor–π–Acceptor (D–π–A) Organic Linkers for Metal–Organic Frameworks with Extended Visible‐Light Absorption
2026
Overview
Metal–organic frameworks (MOFs) are promising materials for photocatalytic hydrogen production. However, their efficiency is often limited by the optical properties of conventional organic linkers, such as terephthalic acid (TA). In this work, the synthesis of two novel triphenylamine‐based organic dyes (L0‐TA and L1‐TA) featuring a donor–π–acceptor (D–π–A) structure is reported. These dyes are functionalized with a terminal moiety analogous to aminoterephthalic acid, which serves as visible‐light‐absorbing linkers. These dyes retain the coordination ability required for MOF assembly while enhancing light‐harvesting properties. Crystallographic simulations confirm the structural compatibility of these colinkers in hybrid MOFs, providing a viable strategy to maintain MOF crystallinity while improving photocatalytic performance. Triphenylamine‐based dyes L0‐TA and L1‐TA are synthesized and electrochemically characterized to assess their suitability for photocatalytic hydrogen production via water splitting. Crystallographic simulations confirm their structural compatibility with the MIL‐125 framework, allowing incorporation without steric clashes. These findings highlight their potential as photosensitizing linkers in etal–organic framework‐based photocatalytic systems.
