Pyrolysis of Helical Coordination Polymers for Metal-Sulfide-Based Helices with Broadband Chiroptical Activity

Abstract

Fabrication of chiroptical materials with broadband response in the visible light region is vital to fully realize their potential applications. One way to achieve broadband chiroptical activity is to fabricate chiral nanostructures from materials that exhibit broadband absorption in the visible light region. However, the compounds used for chiroptical materials have predominantly been limited to materials with narrowband spectral response. Here, we synthesize AgS-based nanohelices derived from helical coordination polymers. The right- and left-handed coordination helices used as precursors are prepared from l- and d-glutathione with Ag and a small amount of Cu. The pyrolysis of the coordination helices yields right- and left-handed helices of CuAgS/C, which exhibit chiroptical activity spanning the entire visible light region. Finite element method simulations substantiate that the broadband chiroptical activity is attributed to synergistic broadband light absorption and light scattering. Furthermore, another series of CuAgS/C nanohelices are synthesized by choosing the l- or d-Glu-Cys as starting materials. The pitch length of nanohelicies is controlled by changing the peptides, which alters their chiroptical properties. The pyrolysis of coordination helices enables one to fabricate helical AgS-based materials that enable broadband chiroptical activity but have not been explored owing to the lack of synthetic routes.

Controlled Fabrication of 3D Chiral Microwrinkles via Asymmetrical and Biaxial Bucklings

“…Such man‐made chiral materials present unique functions that arise from the chiral shapes of their nano‐ and microstructures. Chiral nanomaterials have chiroptical activity with preferential interactions with circularly polarized light . Other studies have shown enantioselective interactions with biomaterials, which are capable of tuning physiological functions .…”

Coordination Polymer Derived Sulfur Vacancies Rich CdS Composite Photocatalyst with Nitrogen Doped Carbon as Matrix for H2 Production

“…No obvious decrease in H 2 production rate occurs during the water splitting process for 30 h. Furthermore, we also discussed the influence of nitrogen species on H 2 production activity. Up to now, some composite materials composed by metal oxide and metal sulfide with carbon as matrix have been obtained with coordination polymer precursor, but they have never been employed to fabricate sulfur vacancies containing composite materials; CdS@NC represents the first example. − …”

Chirality control of inorganic materials and metals by peptides or amino acids

“…21,[80][81][82][83] The preferential attachment of the biomolecules enabled morphology modulation of metal surfaces in a single particle level, whereas earlier studies focused on the chiral structure of self-assembled plasmonic nanoparticles and the chiroptical responses. [84][85][86][87][88][89] Due to the plasmonic properties, single plasmonic nanoparticles with chiral morphology could induce strong chiroptical responses at its plasmon frequency. computational modal analysis of plasmon resonances of a chiral nanocrystal and showed that a chiral twister with helical surface exhibited strong CD responses at the main plasmonic resonance.…”