Insights into CO<sub>2</sub> adsorption and chemical fixation properties of VPI-100 metal–organic frameworks
作者:Jie Zhu、Jianzhao Liu、Yered Machain、Brittany Bonnett、Shaoyang Lin、Meng Cai、Matthew C. Kessinger、Pavel M. Usov、Wenqian Xu、Sanjaya D. Senanayake、Diego Troya、Alan R. Esker、Amanda J. Morris
DOI:10.1039/c8ta06383d
日期:——
Metal–organicframeworks (MOFs) have shown great promise as efficient CO2 adsorbents, as well as an emerging class of heterogeneous catalysts for conversion of CO2 to other useful chemicals. In this work, we synthesized and characterized two isostructural hafnium-based MOFs, denoted as Hf-VPI-100 (Cu) and Hf-VPI-100 (Ni). Both frameworks demonstrated high catalytic efficiency for cycloaddition of CO2
METAL-ORGANIC FRAMEWORKS FOR THE ADSORPTION AND CATALYTIC TRANSFORMATIONS OF CARBON DIOXIDE
申请人:VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
公开号:US20200055020A1
公开(公告)日:2020-02-20
Novel crystalline porous materials known as metal-organic frameworks (MOFs) and methods for their synthesis are provided herein. The MOFs include a M
6
(μ
3
-OH)
8
(OH)
8
(μ
2
,η
2
-(O
2
C)
2
cyclam)
8
cluster, and a metal atom coordinated to the one or more cyclam of the cluster, wherein M is Zr or Hf, and the metal atom is any one of Cu, Ni, Cr, Ru, Co, and Gd. The MOFs can be used as an adsorbent, alone or in a medium with other components, of CO
2
. The MOFs can also be used as a catalyst for the transformation of CO
2
and epoxides to cyclic carbonates. The MOFs can also be used in the electrochemical catalytic reduction of CO
2
. The MOFs can also be used for photocatalytic CO
2
reduction for the production of carbon-based fossil fuels. The MOFs can also be used for light-induced nitric oxide (NO) release. The MOFs can also be used as magnetic resonance imaging (MRI) agents.
Metal-organic frameworks for the adsorption and catalytic transformations of carbon dioxide
申请人:VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
公开号:US10994259B2
公开(公告)日:2021-05-04
Novel crystalline porous materials known as metal-organic frameworks (MOFs) and methods for their synthesis are provided herein. The MOFs include a M6(μ3-OH)8(OH)8(μ2,η2-(O2C)2cyclam)8 cluster, and a metal atom coordinated to the one or more cyclam of the cluster, wherein M is Zr or Hf, and the metal atom is any one of Cu, Ni, Cr, Ru, Co, and Gd. The MOFs can be used as an adsorbent, alone or in a medium with other components, of CO2. The MOFs can also be used as a catalyst for the transformation of CO2 and epoxides to cyclic carbonates. The MOFs can also be used in the electrochemical catalytic reduction of CO2. The MOFs can also be used for photocatalytic CO2 reduction for the production of carbon-based fossil fuels. The MOFs can also be used for light-induced nitric oxide (NO) release. The MOFs can also be used as magnetic resonance imaging (MRI) agents.
WATER-SOLUBLE NANOCRYSTALS AND METHODS OF PREPARING THEM
申请人:Wang Fuke
公开号:US20110129944A1
公开(公告)日:2011-06-02
Disclosed is a water soluble nanocrystal having a core comprising at least one metal M1 selected from an element of subgroup IIb, subgroup VIIa, subgroup VI11a, subgroup 1b, subgroup IV, main group II or main group III of the periodic system of the elements (PSE), at least one element A selected from an element of the main group V or VI of the periodic system of the elements, wherein a capping reagent is attached to the surface of the core of the nanocrystal, and wherein the capping reagent forms a host guest complex with a water soluble host molecule. Also disclosed is a water soluble nanocrystal having a core comprising at least one metal M1 selected from an element of subgroup I1b, subgroup VI1a, subgroup VI11a, subgroup 1b, subgroup IV, main group II or main group III of the periodic system of the elements (PSE), and at least one element A selected from an element of the main group V or VI of the periodic system of the elements, wherein a capping reagent is attached to the surface of the core of the nanocrystal, and wherein the capping reagent is covalently linked to a water soluble host molecule. Also disclosed is a water soluble nanocrystal having a core comprising at least one metal M1 selected from an element of subgroup I1b, subgroup VI1a, subgroup VI11a, subgroup 1b, subgroup IV, main group II or main group III of the periodic system of the elements (PSE), wherein a capping reagent is attached to the surface of the core of the nanocrystal, and wherein the capping reagent forms a host guest complex with a water soluble host molecule. Finally, compositions and uses of such nanocrystals are disclosed.
A New Class of Metal-Cyclam-Based Zirconium Metal–Organic Frameworks for CO<sub>2</sub> Adsorption and Chemical Fixation
作者:Jie Zhu、Pavel M. Usov、Wenqian Xu、Paula J. Celis-Salazar、Shaoyang Lin、Matthew C. Kessinger、Carlos Landaverde-Alvarado、Meng Cai、Ann M. May、Carla Slebodnick、Dunru Zhu、Sanjaya D. Senanayake、Amanda J. Morris
DOI:10.1021/jacs.7b10643
日期:2018.1.24
frameworks (MOFs) have shown great promise in catalysis, mainly due to their high content of active centers, large internal surface areas, tunable pore size, and versatile chemical functionalities. However, it is a challenge to rationally design and construct MOFs that can serve as highly stable and reusable heterogeneous catalysts. Here two new robust 3D porous metal-cyclam-based zirconiumMOFs, denoted
金属有机骨架 (MOF) 在催化方面显示出巨大的潜力,主要是由于它们的活性中心含量高、内表面积大、孔径可调和多功能的化学功能。然而,合理设计和构建可作为高度稳定和可重复使用的多相催化剂的 MOF 是一个挑战。在这里,已经通过调制合成策略制备了两种新的坚固的 3D 多孔金属环链烷基锆 MOF,表示为 VPI-100 (Cu) 和 VPI-100 (Ni)。框架由八个连接的 Zr6 簇和作为有机接头的金属环组装而成。重要的是,仙客来核具有可用于客体相互作用的轴向协调位点,并保持了母仙客来环所表现出的电子特性。VPI-100 MOFs 在各种有机和水性溶剂中在很宽的 pH 范围内表现出优异的化学稳定性,并显示出高 CO2 吸收能力(在 273 K 和 1 atm 下吸附高达 ~9.83 wt%)。此外,VPI-100 MOF 在使用环氧化物(包括空间位阻环氧化物)化学固定 CO2 方面,在 Zr