Salen‐Based Conjugated Microporous Polymers for Efficient Oxygen Evolution Reaction

Zhou, Wei; Yang, Li; Zhou, Fuyu; Deng, Qiwen; Wang, Xiao; Zhai, Dong; Ren, Guoqing; Han, Keli; Deng, Weiqiao; Sun, Lin

doi:10.1002/chem.202001039

Cited by 24 publications

(11 citation statements)

References 54 publications

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“…This is due to their facile synthesis, structural flexibility, easily tunable electronic properties, associated with their diverse applications in various branches of science [9]. Transition metal complexes of Schiff base ligands [10] have also found applications in many research areas such as catalysis [11][12][13], molecular magnetism [14][15][16][17], sensing [18][19][20], energy materials [21,22], as well as molecular building blocks [23,24], and for their numerous bioactive properties [25][26][27][28][29]. On the other hand, transition metal complexes of Schiff base ligands form also a promising and efficient class of nonlinear optical (NLO) molecular materials [30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Transition metal(II) complexes featuring push-pull dianionic Schiff base ligands: synthesis, crystal structure, electrochemical, and NLO studies

Celedón

Roisnel

Carrillo

et al. 2020

Journal of Coordination Chemistry

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The present study reports the synthesis and characterization of a family of three new neutral Zn(II), Cu(II), Co(II) bimetallic (2-4) and one ionic Co(II) trimetallic (5) complexes of ferrocene-containing unsymmetrically-substituted N 2 O 2 tetradentate Schiff base ligands. They were all prepared via a three-component one-pot template reaction involving the 4hydroxyphenyl substituted ferrocenyl-containing half unit Fc-C(=O)CH=C(4-C 6 H 4 OH)NH-CH 2 CH 2 NH 2 (Fc = ferrocenyl = (η 5 -C 5 H 5 )Fe(η 5 -C 5 H 4 )), metal(II) acetate and 5nitrosalicylaldehyde (for 2-4) or the organometallic salicylaldehyde [Cp*Ru(η 6 -2-OH-C 6 H 4 CHO)]PF 6 (for 5) (Cp* = η 5 -C 5 Me 5 ). The four complexes were isolated as air and moisture insensitive solids in yields > 80 %. They were characterized using several analytical techniques such as CHN analyses, ESI mass, FT-IR, UV-vis and NMR spectroscopy, including single crystal X-ray diffraction analysis. The crystal structure of 3 reveals that the four-coordinate copper atom adopts a square planar geometry with two nitrogen and two oxygen atoms as donors occupying cis positions. An electrochemical study utilizing cyclic voltammetry showed for each compound a reversible redox process ascribed to the Fe(II)/Fe(III) couple of the appended donor ferrocene. The largest anodic potentials were measured for the two Co(II) species. The second-order NLO responses of the push-pull chromophores 2-5 have been determined by harmonic light scattering measurements in N,Ndimethylformamide solutions at 1.91 μm incident wavelength, and rather high, non-resonant quadratic hyperpolarisability β values ranging from 140-280 x 10 -30 esu were determined.

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Section: Introductionmentioning

confidence: 99%

Transition metal(II) complexes featuring push-pull dianionic Schiff base ligands: synthesis, crystal structure, electrochemical, and NLO studies

Celedón

Roisnel

Carrillo

et al. 2020

Journal of Coordination Chemistry

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“…Recent breakthroughs in electron-catalyzed molecular recognition enlighten us that the electrochemical sensor is the direction for achieving this goal. , The strategy of electron catalysis is with certain benefits that the energy barrier can be decreased by the injection of electron(s) significantly. , However, the redox-active substrate capable of accepting (an) electron(s) rapidly is needed for high-efficiency electrocatalysis. In our prior work, we find that the salen ( N , N ′-bis(salicylidene)ethylenediamine)-based catalyst is suitable for electrocatalysis. , Thus, to obtain a NO sensor for daily FeNO monitoring and large-scale FeNO detection, we designed a single-atom electrocatalyst for the rapid, low-cost, and accurate detection of NO guided by density functional theory (DFT) calculations. Figure a presents the geometric structure of the simplified salen-derived single-atom model catalyst M-N 2 O 2 .…”

Section: Resultsmentioning

confidence: 99%

“…In our prior work, we find that the salen (N,N′-bis(salicylidene)ethylenediamine)-based catalyst is suitable for electrocatalysis. 36,37 Thus, to obtain a NO sensor for daily FeNO monitoring and large-scale FeNO detection, we designed a single-atom electrocatalyst for the rapid, low-cost, and accurate detection of NO guided by density functional theory (DFT) calculations. Figure 2a presents the geometric structure of the simplified salen-derived single-atom model catalyst M-N 2 O 2 .…”

mentioning

confidence: 99%

Ultrasensitive NO Sensor Based on a Nickel Single-Atom Electrocatalyst for Preliminary Screening of COVID-19

Zhou

Tan

et al. 2022

ACS Sens.

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A new coronavirus, SARS-CoV-2, has caused the coronavirus disease-2019 (COVID-19) epidemic. A rapid and economical method for preliminary screening of COVID-19 may help to control the COVID-19 pandemic. Here, we report a nickel single-atom electrocatalyst that can be printed on a paper-printing sensor for preliminary screening of COVID-19 suspects by efficient detection of fractional exhaled nitric oxide (FeNO). The FeNO value is confirmed to be related to COVID-19 in our exploratory clinical study, and a machine learning model that can accurately classify healthy subjects and COVID-19 patients is established based on FeNO and other features. The nickel single-atom electrocatalyst consists of a single nickel atom with N2O2 coordination embedded in porous acetylene black (named Ni-N2O2/AB). A paper-printed sensor was fabricated with the material and showed ultrasensitive response to NO in the range of 0.3–180 ppb. This ultrasensitive sensor could be applied to preliminary screening of COVID-19 in everyday life.

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“…In fact, there are scarce reports of the photocatalytic OER with CPPs. Zhou and co-workers showed the (dark) catalytic activity toward the OER with CPP-based electrodes, [74] and a few recent examples of CTFs as photocatalyst for OER and overall water splitting have been described before. [75,76] In this sense, the design of efficient overall solar water splitting technology based on CPPs usually includes combination with inorganic materials in order to prepare hybrid photoactive materials able to drive the overall water splitting.…”

Section: Solar Energy Conversion By Cpp Through Photocatalytic Reactionsmentioning

confidence: 99%

Conjugated Porous Polymers: Ground‐Breaking Materials for Solar Energy Conversion

Barawi

Collado

Gomez‐Mendoza

et al. 2021

Advanced Energy Materials

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poor applicability for movable applications. Therefore, the development of new technologies to store renewable energy is really important to achieve the transition to a greener energy system. [3] Although new battery technologies will likely meet the need for cost-effective energy storage (1-3 days) for short time scales, fuels are the only effective option for longerterm, seasonal storage, and long-distance transportation applications. [4] Collecting and loading solar energy into electric power and more interestingly directly into valuable chemicals and fuels, as nature does through photosynthesis, is a highly desirable approach to solve this challenge. Since Honda and Fujishima [5] discovered the possibility to emulate this natural phenomenon using TiO 2 as photocatalyst more than 40 years ago, the scientific community has been trying to overcome the challenges hindering the commercialization of water splitting and CO 2 reduction. [6,7] During the past years, a large variety of systems have been proposed to drive the so-called artificial photosynthesis (AP), most of them based on inorganic semiconductors (ISs), usually metal oxides and metal chalcogenides. IS are able to absorb part of the solar spectrum and promote charge separation into electron and holes. In fact, there is a lot of recent work in the literature reviewing the use of ISs as photoabsorbers in photocatalytic, photoelectrochemical (PEC), and photovoltaic (PV) systems. [8,9] The achievements and improvements performed in this area have been always enormous. In this sense, among the huge number of materials explored, TiO 2 has been by far the most investigated until now due to its unique properties: high photoactivity and chemical stability, availability, and nontoxicity. [10,11] However, some ISs, and TiO 2 in particular, present well-known shortcomings in terms of low light absorption in the visible part of solar spectrum and fast charge recombination that limits electron donor-acceptor process. Therefore, the energy conversion efficiency achieved until now is still low. The improvement of this efficiency relies on the use of new materials that are able to harvest solar light and active toward CO 2 /N 2 reduction and water splitting. The most successful strategies to improve the photocatalyst performance so far have been: i) the modification of the optoelectronic properties of TiO 2 or other ISs, [12] ii) the use of organic materials as semiconductors, Solar energy conversion plays a very important role in the transition to a more sustainable energy system. In this sense, so many systems have been proposed to drive artificial photosynthesis, most of them based on inorganic semiconductors, and the achievements performed continue every day. However, most of these systems present well-known shortcomings as low light absorption, fast charge recombination, and lack of tunability, thus limiting their efficiency. The use of organic polymers in general and conjugated porous polymers (CPPs) in particular, opens the door to a multitude of new possibilities...

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Salen‐Based Conjugated Microporous Polymers for Efficient Oxygen Evolution Reaction

Cited by 24 publications

References 54 publications

Transition metal(II) complexes featuring push-pull dianionic Schiff base ligands: synthesis, crystal structure, electrochemical, and NLO studies

Transition metal(II) complexes featuring push-pull dianionic Schiff base ligands: synthesis, crystal structure, electrochemical, and NLO studies

Ultrasensitive NO Sensor Based on a Nickel Single-Atom Electrocatalyst for Preliminary Screening of COVID-19

Conjugated Porous Polymers: Ground‐Breaking Materials for Solar Energy Conversion

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