Hybrid Mn-Porphyrin-Nanogold Nanomaterial Applied for the Spectrophotometric Detection ofβ-Carotene

Abstract

A hybrid formed between Mn(III) tetratolyl-porphyrin chloride (MnTTPCl) and spherical gold colloid (n-Au),MnTTPCl/n-Au, was tested along with its component nanomaterials as promising candidates in the detection ofβ-carotene from ethanol solutions. Among the investigated nanomaterials, the largestβ-carotene concentration interval detectable by UV-Vis spectrophotometry (9.80 × 10−6 M–1.15 × 10−4 M) was obtained when using theMnTTPCl/n-Auhybrid. This hybrid material gives rise to the widest absorption band, covering the range of 425 nm to 581 nm after treatment withβ-carotene.