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2,4,5-Trichlorophenoxyacetic acid (2,4,5-T) is a synthetic auxin herbicide that was widely used for weed control and as a defoliant during the Vietnam War, known as part of Agent Orange. Structurally, it is a chlorinated phenoxyacetic acid, with chlorine atoms at positions 2, 4, and 5 on the phenoxy ring. It functions by mimicking natural plant hormones, disrupting growth processes, and leading to uncontrolled growth and eventual plant death. The biodegradation of 2,4,5-T involves dehalogenation, where methanogenic aquifer samples convert it into intermediates such as dichlorophenoxyacetic acids, monochlorophenoxyacetic acids, and phenol. Additionally, photo-assisted degradation processes using Fe(II) catalysis and UV irradiation have been explored to enhance its breakdown. Surface-enhanced Raman spectroscopy (SERS) has been employed to study its chemical enhancement mechanisms on silver substrates. The compound's environmental persistence and potential health risks have led to its ban in many countries.
仅用于科研。不用于诊断过程。未经明确授权不得转售。