Search results for: Hongbo Guo

Items from 1 to 20 out of 192 results

article

Constructing Co₄(SO₄)₄ Clusters within Metal–Organic Frameworks for Efficient Oxygen Electrocatalysis

Zuozhong Liang, Guojun Zhou, Huang Tan, Yonghong Mou, more

Advanced Materials > 36 > 38 > n/a - n/a

Multinuclear metal clusters are ideal candidates to catalyze small molecule activation reactions involving the transfer of multiple electrons. However, synthesizing active metal clusters is a big challenge. Herein, on constructing an unparalleled Co₄(SO₄)₄ cluster within porphyrin‐based metal–organic frameworks (MOFs) and the electrocatalytic features of such Co₄(SO₄)₄ clusters for the oxygen evolution...

article

Rapid migration of Mongolian oak into the southern Asian boreal forest

Yang Tang, Enzai Du, Hongbo Guo, Yang Wang, more

Global Change Biology > 30 > 1 > n/a - n/a

The migration of trees induced by climatic warming has been observed at many alpine treelines and boreal–tundra ecotones, but the migration of temperate trees into southern boreal forest remains less well documented. We conducted a field investigation across an ecotone of temperate and boreal forests in northern Greater Khingan Mountains of northeast China. Our analysis demonstrates that Mongolian...

article

Coordination Tuning of Metal Porphyrins for Improved Oxygen Evolution Reaction

Haoyuan Lv, Xue‐Peng Zhang, Kai Guo, Jinxiu Han, more

Angewandte Chemie International Edition > 62 > 38 > n/a - n/a

The nucleophilic attack of water or hydroxide on metal‐oxo units forms an O−O bond in the oxygen evolution reaction (OER). Coordination tuning to improve this attack is intriguing but has been rarely realized. We herein report on improved OER catalysis by metal porphyrin 1‐M (M=Co, Fe) with a coordinatively unsaturated metal ion. We designed and synthesized 1‐M by sterically blocking one porphyrin...

article

Coordination Tuning of Metal Porphyrins for Improved Oxygen Evolution Reaction

Haoyuan Lv, Xue‐Peng Zhang, Kai Guo, Jinxiu Han, more

Angewandte Chemie > 135 > 38 > n/a - n/a

article

A distinctive latitudinal trend of nitrogen isotope signature across urban forests in eastern China

Nan Xia, Enzai Du, Yang Tang, Hongbo Guo

Global Change Biology > 29 > 19 > 5666 - 5676

Rapid urbanization has greatly altered nitrogen (N) cycling from regional to global scales. Compared to natural forests, urban forests receive much more external N inputs with distinctive abundances of stable N isotope (δ¹⁵N). However, the large‐scale pattern of soil δ¹⁵N and its imprint on plant δ¹⁵N remain less well understood in urban forests. By collecting topsoil (0–20 cm) and leaf samples from...

article

Polyhedral Oligomeric Silsesquioxane‐Based Nanoparticles for Efficient Chemotherapy of Glioblastoma

Xiangyang Zhong, Gang Wei, Boyang Liu, Chenyang Wang, more

Small > 19 > 18 > n/a - n/a

Glioblastoma (GBM) is the most common lethal brain tumor with dismal treatment outcomes and poor response to chemotherapy. As the regulatory center of cytogenetics and metabolism, most tumor chemotherapeutic molecules exert therapeutic effects in the nucleus. Nanodrugs showing the nuclear aggregation effect are expected to eliminate and fundamentally suppress tumor cells. In this study, a nanodrug...

article

Role‐Specialized Division of Labor in CO₂ Reduction with Doubly‐Functionalized Iron Porphyrin Atropisomers

Kai Guo, Xialiang Li, Haitao Lei, Hongbo Guo, more

Angewandte Chemie > 134 > 35 > n/a - n/a

In enzymes, the active site residues function differently to promote chemical reactions. Such a role‐specialized division of labor has been rarely realized by synthetic catalysts. We report herein on catalytic CO₂ reduction with Fe porphyrins decorated with two cationic N,N,N‐trimethylbenzylamine groups in cis‐ or trans‐arrangement. The cis‐isomer outperforms the trans‐isomer and reaches a TOF_max...

article

Role‐Specialized Division of Labor in CO₂ Reduction with Doubly‐Functionalized Iron Porphyrin Atropisomers

Kai Guo, Xialiang Li, Haitao Lei, Hongbo Guo, more

Angewandte Chemie International Edition > 61 > 35 > n/a - n/a

article

Facile synthesis of a novel magnetic covalent organic frameworks for extraction and determination of five fungicides in Chinese herbal medicines

Yurui Li, Zhenning Ma, Hongbo Guo, Xiuli Xu, more

Journal of Separation Science > 45 > 13 > 2344 - 2355

A novel magnetic covalent organic framework was synthesized via a one‐step coating approach with solvothermal reaction employing 2,4,6‐tris(4‐aminophen‐yl)‐1,3,5‐triazine and 2,4,6‐triformylphloroglucinol as two building blocks by covalent bonding. The prepared magnetic covalent organic frameworks were properly characterized by different techniques and employed as adsorbents of magnetic solid‐phase...

article

Metal‐Corrole‐Based Porous Organic Polymers for Electrocatalytic Oxygen Reduction and Evolution Reactions

Haitao Lei, Qingxin Zhang, Zuozhong Liang, Hongbo Guo, more

Angewandte Chemie International Edition > 61 > 24 > n/a - n/a

Integrating molecular catalysts into designed frameworks often enables improved catalysis. Compared with porphyrin‐based frameworks, metal‐corrole‐based frameworks have been rarely developed, although monomeric metal corroles are usually more efficient than porphyrin counterparts for the electrocatalytic oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). We herein report on metal‐corrole‐based...

article

Metal‐Corrole‐Based Porous Organic Polymers for Electrocatalytic Oxygen Reduction and Evolution Reactions

Haitao Lei, Qingxin Zhang, Zuozhong Liang, Hongbo Guo, more

Angewandte Chemie > 134 > 24 > n/a - n/a

article

Comprehensive histological imaging of native microbiota in human glioma

Jiajia Zhao, Dian He, Hei Ming Lai, Yingying Xu, more

Journal of Biophotonics > 15 > 4 > n/a - n/a

Mounting evidence suggests that distinct microbial communities reside in tumors and play important roles in tumor physiology. Recently, a previous study profiled the composition and localization of intratumoral bacteria using 16S ribosomal DNA (rDNA) sequencing and histological visualization methods across seven tumor types, including human glioblastoma. However, their results based on traditional...

article

Inside Front Cover

Hongbo Guo, Hengna Zhao, Jingjing Yu, Xiaowei He, more

Journal of Biophotonics > 14 > 11 > n/a - n/a

This study adopted a hybrid diffusion equation with third order simplified spherical harmonics model and proposed a novel Least Square QR factorization based on the Lasso algorithm to overcome the limitation of the single proton propagation model and enable fast iteration and accurate sparse reconstruction for X‐ray Luminescence Computed Tomography (XLCT). It achieves superior reconstruction performance...

article

X‐ray luminescence computed tomography using a hybrid proton propagation model and Lasso‐LSQR algorithm

Hongbo Guo, Hengna Zhao, Jingjing Yu, Xiaowei He, more

Journal of Biophotonics > 14 > 11 > n/a - n/a

X‐ray luminescence computed tomography (XLCT) uses external X‐rays for luminescence excitation, which is becoming a promising molecular imaging technique with superb penetration depth and spatial resolution. To achieve the tomographic mapping of luminescence distribution, accurate optical propagation model and suitable reconstruction method are two keys for XLCT, but not satisfied. To overcome the...

article

Metal–Organic‐Framework‐Supported Molecular Electrocatalysis for the Oxygen Reduction Reaction

Zuozhong Liang, Hongbo Guo, Guojun Zhou, Kai Guo, more

Angewandte Chemie > 133 > 15 > 8553 - 8557

Synthesizing molecule@support hybrids is appealing to improve molecular electrocatalysis. We report herein metal–organic framework (MOF)‐supported Co porphyrins for the oxygen reduction reaction (ORR) with improved activity and selectivity. Co porphyrins can be grafted on MOF surfaces through ligand exchange. A variety of porphyrin@MOF hybrids were made using this method. Grafted Co porphyrins showed...

article

Metal–Organic‐Framework‐Supported Molecular Electrocatalysis for the Oxygen Reduction Reaction

Zuozhong Liang, Hongbo Guo, Guojun Zhou, Kai Guo, more

Angewandte Chemie International Edition > 60 > 15 > 8472 - 8476

article

Inside Cover: Sparse‐graph manifold learning method for bioluminescence tomography (J. Biophotonics 4/2020)

Hongbo Guo, Ling Gao, Jingjing Yu, Xiaowei He, more

Journal of Biophotonics > 13 > 4 > n/a - n/a

This study proposed a Sparse‐Graph Manifold Learning (SGML) method to balance the sparseness and morphology preserving for bioluminescence tomography reconstruction. It inherits the benefits of non‐convex sparsity constraint and dynamic Laplacian graph model. The results of numerical simulations and in vivo experiments demonstrate that the proposed method yields accurate and robust results in terms...

article

Sparse‐graph manifold learning method for bioluminescence tomography

Hongbo Guo, Ling Gao, Jingjing Yu, Xiaowei He, more

Journal of Biophotonics > 13 > 4 > n/a - n/a

In preclinical researches, bioluminescence tomography (BLT) has widely been used for tumor imaging and monitoring, imaged‐guided tumor therapy, and so forth. For these biological applications, both tumor spatial location and morphology analysis are the leading problems needed to be taken into account. However, most existing BLT reconstruction methods were proposed for some specific applications with...

article

Silk Lattice Structures from Unidirectional Silk Fiber–Reinforced Composites for Breaking Energy Absorption

Jiao Wen, Yang Zeng, Change Wu, Juan Guan, more

Advanced Engineering Materials > 22 > 3 > n/a - n/a

Lightweight lattice structures engineered at various length scales have attracted considerable research and development (R&D) efforts. Natural silk fibers and their composites have shown great energy absorption potential and impact resistance. Herein, lattice structures are designed and fabricated from silk‐reinforced epoxy resin plastics (SFRPs). Unidirectional SFRPs from prepreg display excellent...

article

A novel in vivo Cerenkov luminescence image‐guided surgery on primary and metastatic colorectal cancer

Zeyu Zhang, Yawei Qu, Yu Cao, Xiaojing Shi, more

Journal of Biophotonics > 13 > 3 > n/a - n/a

Intraoperative Cerenkov luminescence imaging (CLI) can effectively improve the performance of tumor surgery. Nevertheless, the existing approaches are still unsatisfying to the clinical demands of open surgery. This study develops a novel intraoperative in vivo CLI approach to investigate the potential and value of Cerenkov luminescence (CL) image‐guided surgery. A system characterized with high sensitivity...

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INFONA - science communication portal

Search results for: Hongbo Guo

Constructing Co₄(SO₄)₄ Clusters within Metal–Organic Frameworks for Efficient Oxygen Electrocatalysis

Rapid migration of Mongolian oak into the southern Asian boreal forest

Coordination Tuning of Metal Porphyrins for Improved Oxygen Evolution Reaction

Coordination Tuning of Metal Porphyrins for Improved Oxygen Evolution Reaction

A distinctive latitudinal trend of nitrogen isotope signature across urban forests in eastern China

Polyhedral Oligomeric Silsesquioxane‐Based Nanoparticles for Efficient Chemotherapy of Glioblastoma

Role‐Specialized Division of Labor in CO₂ Reduction with Doubly‐Functionalized Iron Porphyrin Atropisomers

Role‐Specialized Division of Labor in CO₂ Reduction with Doubly‐Functionalized Iron Porphyrin Atropisomers

Facile synthesis of a novel magnetic covalent organic frameworks for extraction and determination of five fungicides in Chinese herbal medicines

Metal‐Corrole‐Based Porous Organic Polymers for Electrocatalytic Oxygen Reduction and Evolution Reactions

Metal‐Corrole‐Based Porous Organic Polymers for Electrocatalytic Oxygen Reduction and Evolution Reactions

Comprehensive histological imaging of native microbiota in human glioma

Inside Front Cover

X‐ray luminescence computed tomography using a hybrid proton propagation model and Lasso‐LSQR algorithm

Metal–Organic‐Framework‐Supported Molecular Electrocatalysis for the Oxygen Reduction Reaction

Metal–Organic‐Framework‐Supported Molecular Electrocatalysis for the Oxygen Reduction Reaction

Inside Cover: Sparse‐graph manifold learning method for bioluminescence tomography (J. Biophotonics 4/2020)

Sparse‐graph manifold learning method for bioluminescence tomography

Silk Lattice Structures from Unidirectional Silk Fiber–Reinforced Composites for Breaking Energy Absorption

A novel in vivo Cerenkov luminescence image‐guided surgery on primary and metastatic colorectal cancer

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