RSC Advances
·
2016
·Vol. 6
·期 45
·39150-39158
·
IF 3.289
Chiyao Bai,Meicheng Zhang,Bo Li,Xiaosheng Zhao,Shuang Zhang,Lei Wang,Yang Li,Ji Zhang,Lijian Ma,Shoujian Li
Recently, research into functional materials with various desired properties has been ceaselessly promoted. However, the development of convenient and practical strategies for building flexible material platforms to realize multi-functionalization and to prepare various functional derivatives is still a challenge. Herein, we propose for the first time a new strategy that introduces conjugated carbon–carbon triple bonds into the skeleton of covalent organic frameworks (COFs) that can act as both building blocks and active sites to create a versatile platform. Based on the platform, in situ multipurpose functionalization according to diverse real needs can be achieved more easily and efficiently with different addition reactions, compared with current approaches used for the preparation of functional materials. In this paper, a novel COF material (TCD), which contains diynes acting as a skeleton of the material platform, was directly prepared under microwave irradiation. Then, three new functional materials with a cyano group (TCD-CN), an amidoxime group (TCD-AO) and a hydroxyl group (TCD-OH) were obtained by further functionalization of the CC bonds in TCD. The capabilities of the prepared materials for the selective separation of uranium from a simulated nuclear industrial effluent were examined, and TCD-AO was found to exhibit the highest separation efficiency.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 21
·7864-7871
·
IF 8.307
Dong Yu,Yao Shen,Wei Zhu,Ji-Ming Hu,Ai-Guo Shen
Developing security inks with spectral outputs/multiple colors, which have unique identification characteristics, is of great importance in enhancing the anti-counterfeiting strength of ink anti-counterfeiting technology. Herein, a print-driven triple-bond coding mode is proposed for the first time. Two kinds of triple-bond-containing polymeric nanoparticles (NPs) with Raman shifts at 2227 and 2241 cm−1 have been designed into printable ink, and the decimal coding output can be easily obtained by reasonably adjusting the proportions of the two polymeric NPs. Single Raman scattering inks can be used as invisible inks to print monochromatic patterns and words that the decoder can read out. According to the two-dimensional pixels of the graphics decoder, invisible colorful graphics can be printed with mixed inks under different polymer proportions. More interestingly, three-dimensional invisible patterns with stronger anti-counterfeiting strength can also be obtained in the double-layer anti-counterfeiting patterns with different proportions of ink by the spatial complementary coding mode. It is predicted that more security inks associated with triple-bond Raman signals will spur the application of the anti-counterfeiting field.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Mingzhe Cai,Jiayi Fan,Qian Wang,Yongqian Zhang,Yafei Ma,Jingjie Suo,Miaomiao Zhang,Shusheng Zhang,Sheng Chen
Mercury poses a significant threat to both ecosystems and humans due to its high toxicity, non-biodegradability, and persistent accumulation. The development of suitable tools for the quantitative and real-time detection of mercury in living organisms is extremely attractive. However, reliable quantitative analysis of mercury in living organisms using surface-enhanced Raman scattering (SERS) nanoprobe is still a challenge. Herein we reported the first triple bond-mediated ratiometric SERS nanoprobe for in vitro and ex vivo quantitative monitoring of mercury (Hg 2+ ). In the SERS nanoprobe, an internal standard (IS, 4-MBN)-embedded gold nanoflowers was first synthesized, and then the synthesized Raman reporter 4-MPA was bound to the surface as the recognition group for Hg 2+ . The SERS nanoprobe demonstrated a dose-dependent ratio change (I 2145 /I 2224 and I 2105 /I 2224 ) in the cellular Raman-silent region upon reacting with Hg 2+ , and the detection limit is as low as 5.6 nM (I 2145 /I 2224 ). Moreover, the nanoprobe was used to detect Hg 2+ in water samples, tea, and fish samples with high accuracy and recovery rate (91.31 %-107.9 %). Notably, the quantitative visualisation of Hg 2+ in living cells and mouse liver tissue was achieved based on Raman silent region ratio imaging without bio-interference. This study highlights the potential of the established bioorthogonal ratiometric SERS nanoprobe for in vitro and ex vivo quantitative monitoring of mercury. We anticipate that the novel SERS nanoprobe has great application potential in the study of Hg 2+ -related physiological and pathological events in the future.
研究领域:
分析化学
·
环境科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Chemistry
·
2025
·
IF 20.2
Jiang Hongjie,Zhao Jing,Meng Qingyu,Zhao Xiao-Kun,Guo Min,Hu Han-Shi,Li Jun,Chen Ning
Metal–ligand multiple bonds are ubiquitous in coordination and organometallic chemistry. In contrast, lanthanide–carbon multiple bonds are difficult to form. The isolation of complexes containing lanthanide–carbon double bonds with terminal methyl carbene (=CH 2 ) and lanthanide–carbon triple bonds remains challenging. Here we present the synthesis of a lanthanide–carbon triple bond contained inside an endohedral fullerene cage. More specifically, we report a cerium–carbide [Ce≡CSc 2 ] cluster encapsulated inside a C 80 fullerene cage. The molecular structure of Ce≡CSc 2 @C 80 and the nature of the Ce≡C triple bond are studied through X-ray crystallography, spectroscopic analyses and quantum chemical calculations. Our data reveal a very short Ce≡C distance of 1.969(7) Å. Chemical bonding analysis suggests that the formation of the Ce≡C bond primarily arises from the stronger bonding affinity between carbon and cerium compared with scandium inside the encapsulated cluster. The fullerene cage plays a crucial role in stabilizing and protecting this trimetallic carbide cluster featuring a Ce≡C triple bond.
研究领域:
无机化学
·
有机金属化学
·
材料科学
·
物理化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Chemistry
·
2024
·Vol. 16
·期 3
·373-379
·
IF 19.2
Guan Yeqin,Wen Hong,Cui Kaixun,Wang Qianru,Gao Wenbo,Cai Yongli,Cheng Zibo,Pei Qijun,Li Zhao,Cao Hujun,He Teng,Guo Jianping,Chen Ping
Photon-driven chemical processes are usually mediated by oxides, nitrides and sulfides whose photo-conversion efficiency is limited by charge carrier recombination. Here we show that lithium hydride undergoes photolysis upon ultraviolet illumination to yield long-lived photon-generated electrons residing in hydrogen vacancies, known as F centres. We demonstrate that photon-driven dehydrogenation and dark rehydrogenation over lithium hydride can be fulfilled reversibly at room temperature, which is about 600 K lower than the corresponding thermal process. As light-driven F centre generation could provide an alternative approach to charge carrier separation to favour chemical transformations that are kinetically or thermodynamically challenging, we show that light-activated lithium hydride cleaves the N≡N triple bond to form a N–H bond under mild conditions. Co-feeding a N 2 /H 2 mixture with low H 2 partial pressure leads to photocatalytic ammonia formation at near ambient conditions. This work provides insights into the development of advanced materials and processes for light harvesting and conversion.
研究领域:
化学
·
材料科学
·
催化
·
光化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
iScience
·
2023
·Vol. 26
·期 9
·107608-107608
·
IF 5.8
Yujing Li,Huihui Luo,Shuo Wang,Lei Li,Guosong Li,Wen Dai
An unprecedented efficient protocol is developed for the oxidative cleavage of C≡C bonds in alkynes to produce structure-diverse esters using heterogeneous cobalt nanoparticles as catalyst with molecular oxygen as the oxidant. A diverse set of mono- and multisubstituted aromatic and aliphatic alkynes can be effectively cleaved and converted into the corresponding esters. Characterization analysis and control experiments indicate high surface area and pore volume, as well as nanostructured nitrogen-doped graphene-layer coated cobalt nanoparticles are possibly responsible for excellent catalytic activity. Mechanistic studies reveal that ketones derived from alkynes under oxidative conditions are formed as intermediates, which subsequently are converted to esters through a tandem sequential process. The catalyst can be recycled up to five times without significant loss of activity.
研究领域:
化学
·
材料科学
·
催化
·
有机合成
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）