Polyphenylene Dendrimer‐Templated In Situ Construction of Inorganic–Organic Hybrid Rice‐Shaped Architectures

Abstract

A novel dendrimer‐templating method for the synthesis of CuO nanoparticles and the in situ construction of ordered inorganic–organic CuO–G2Td(COOH)16rice‐shaped architectures (RSAs) with analogous monocrystalline structures are reported. The primary CuO nanoparticles are linked by the G2Td(COOH)16 dendrimer. This method provides a way to preserve the original properties of primary CuO nanoparticles in the ordered hybrid nanomaterials by using the 3D rigid polyphenylene dendrimer (G2Td(COOH)16) as a space isolation. The primary CuO nanoparticles with diameter of (6.3 ± 0.4) nm are synthesized via four successive reaction steps starting from the rapid reduction of Cu(NO3)2 by using NaBH4 as reducer and G2Td(COOH)16 as surfactant. The obtained hybrid CuO–G2Td(COOH)16 RSA, formed in the last reaction step, possesses a crystal structure analogous to a monocrystal as observed by transmission electron microscopy(TEM). In particular, the formation process of the RSA is monitored by UV–vis, TEM, and X‐ray diffraction. Small angle X‐ray scattering and Fourier transform infrared spectroscopy are used to investigate the role of the dendrimer in the RSA formation process. The obtained results illuminate that Cu2+COO− coordination bonds play an indispensable role in bridging and dispersing the primary CuO nanoparticles to induce and maintain the hybrid RSA. More importantly, the RSA is retained through the Cu2+COO−coordination bonds even with HCl treatment, suggesting that the dendrimers and Cu2+ ions may form rice‐shaped polymeric complexes which could template the assembly of CuO nanoparticles towards RSAs. This study highlights the feasibility and flexibility of employing the peculiar dendrimers to in‐situ build up hybrid architectures which could further serve as templates, containers or nanoreactors for the synthesis of other nanomaterials.

Porous Au–Ag Alloy Particles Inlaid AgCl Membranes As Versatile Plasmonic Catalytic Interfaces with Simultaneous, in Situ SERS Monitoring

“…[6][7][8][9][10][11][12] On the other hand, another powerful spectroscopic technique based mainly on rough surfaces of noble metal nano-structures, the surface-enhanced Raman scattering (SERS) spectroscopy, has also been introduced into plasmonic photocatalytic systems recently, and so far triggered several promising applications like the photocatalytic degradation induced self-cleaning and recyclable SERS platforms, [13][14][15][16] or inversely, the in-situ SERS monitoring of plasmon-enhanced catalytic reactions. [17][18][19][20] SERS spectroscopy, as a quite helpful tool for trace detection of organic contaminants with high sensitivity and rapid response, [21][22][23] exhibits great superiority over traditionally utilized non-surface-selective UV−visible (UV−vis) absorption spectroscopy for monitoring catalytic reactions.…”

Rational Synthesis of Triangular Au–Ag2S Hybrid Nanoframes with Effective Photoresponses

“…[1] For example, in noble-metal-semiconductor nanostructures, the metallic units may enhance the light-harvesting capability and photocatalytic efficiency by improving the charge separation at the metal-semiconductor interfaces, [2][3][4][5] and tune the photoluminescence and photoelectrochemical behaviours of the semiconductor components. [6][7][8][9] Therefore, tremendous efforts have been devoted to designing and fabricating various metal-semiconductor hybrid structures, such as core-shell particles, [10][11][12] porous nanotubes, [13] nanofibers, [14] heterodimers, [15,16] dumbbell structures [7,17] and matchstick-like nanorods. [18] Meanwhile, hollow nanoframes with large exposed interior and exterior surfaces as well as a hollow internal space have also attracted considerable attention, due to their unique structural features and extensive applications in catalysis and therapeutics.…”

Full Solution‐Processed Synthesis of All Metal Oxide‐Based Tree‐like Heterostructures on Fluorine‐Doped Tin Oxide for Water Splitting

“…Hierarchical assembly of branched nanostructures has attracted intense attention because of the promising applications of the nanostructures in solar cells, water splitting, optoelectronics, sensing, field emission, etc 1, 2. To date, plenty of strategies have been developed to synthesize hierarchically branched structures 3–25. For example, the vapor transport process is one kind of commonly used strategy 3–9.…”