Heteroatoms co-doped copper nanocrystals with negatively shifted d-band center for selective nitrate-to-ammonia production
Feng DuZhikun YaoJikai XiangJingsha LiChanghong WangChunmei ZhangTao HuJinlong LiuChang Ming LiChunxian Guo
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A simple and effective method denoted "pH-adjusting" is used to graft a large amount of heteroatoms such as Al and Ti to mesoporous silica material SBA-15. The products prepared by this method show highly ordered mesostructures with large surface areas and uniform mesopore size distribution. The results of ICP, EDX, 27Al NMR, calcium ion-exchange capacity, and UV−vis spectra show that almost all the heteroatoms added into the initial reaction mixture can be introduced into the products, and moreover, the heteroatoms introduced by this route locate at mainly tetrahedrally coordinated sites.
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Nowadays, exploring the chemistry of curved π-conjugated molecules is one of the big trends in organic chemistry. Recently, research interests have been shifted to heteroatom containing analogs. Among these, bowl-shaped π-conjugated molecules with heteroatoms included within their skeletons have gained interest due to their synthetic difficulty and have been developed dramatically as a motif for heteroatom-doped carbon materials. Here, this review highlights analogs based on polycyclic aromatic hydrocarbons, represented by triangulenes, sumanenes and corannulenes, with heteroatoms. These studies have disclosed the effect of heteroatoms in curved π-surfaces. Nowadays, chemistry of curved π-conjugated molecules is one of the big trends in organic chemistry. Among these, bowl-shaped π-conjugated molecules containing heteroatoms have gained interest due to their synthetic difficulty and as a motif for heteroatom-doped carbon materials. This review highlights the analogs based on polycyclic aromatic hydrocarbons with heteroatoms. These researches have disclosed the effect of heteroatoms in curved π-surface.
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This chapter contains sections titled: Introduction Five-membered systems with one heteroatom Five-membered systems with two heteroatoms Five-membered ring systems with more than two heteroatoms Six-membered heterocycles containing one heteroatom Six-membered heterocycles containing at least two heteroatoms Seven-membered heterocycles containing at least two heteroatoms: 1,4 and 1,5-benzodiazepines Polycyclic heterocycles Conclusion References
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This chapter contains sections titled: Three-Membered Heterocycles with One Heteroatom Four-Membered Heterocycles with One Heteroatom Five-Membered Heterocycles with One Heteroatom Five-Membered Heterocycles with Two Heteroatoms Five-Membered Heterocycles with Three Heteroatoms Five-Membered Heterocycles with Four Heteroatoms Six-Membered Heterocycles with One Heteroatom Six-Membered Heterocycles with Two Heteroatoms Six-Membered Heterocycles with Three Heteroatoms Larger Heterocyclic and Polycyclic Ring Systems References
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