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1. Formate hydrogenlyase, formic acid translocation and hydrogen production: dynamic membrane biology during fermentation

Author:
Katharina Peters; Frank Sargent
Source:
Biochimica et biophysica acta 2023 v.1864 no.1 pp. 148919
ISSN:
0005-2728
Subject:
formic acid,   etc   ; Escherichia coli; fermentation; formate dehydrogenase; formates; hydrogen; hydrogen production; mutation; oxidation; phenotype; quinones;     Show all 11 Subjects
Abstract:
... Formate hydrogenlyase-1 (FHL-1) is a complex-I-like enzyme that is commonly found in gram-negative bacteria. The enzyme comprises a peripheral arm and a membrane arm but is not involved in quinone reduction. Instead, FHL-1 couples formate oxidation to the reduction of protons to molecular hydrogen (H₂). Escherichia coli produces FHL-1 under fermentative conditions where it serves to detoxify formi ...
DOI:
10.1016/j.bbabio.2022.148919

2. Selective removal of heavy metals by Zr-based MOFs in wastewater: New acid and amino functionalization strategy

Author:
Ping Chen; Yalan Wang; Xiaoqin Zhuang; Haijin Liu; Guoguang Liu; Wenying Lv
Source:
Journal of environmental sciences (China) 2023 v.124 pp. 268-280
ISSN:
1001-0742
Subject:
formic acid,   etc   ; adsorbents; adsorption; chromium; ecosystems; heavy metals; human health; pH; pollution; porosity; surface area; toxicity; wastewater; water quality; China;     Show all 15 Subjects
Abstract:
... Zr-based metal-organic frameworks (MOFs) have been developed in recent years to treat heavy metals, e.g. hexavalent chromium Cr⁶⁺ pollution, which damages the surrounding ecosystem and threaten human health. This kind of MOF is stable and convenient to prepare, but has the disadvantage of low adsorption capacity, limiting its wide application. To this end, a novel formic acid and amino modified MO ...
DOI:
10.1016/j.jes.2021.10.010

3. In situ formic acid dehydrogenation observation using a UV-vis-diffuse-reflectance spectroscopy system

Author:
Risheng Li; Tetsuya Kodaira; Hajime Kawanami
Source:
Chemical communications 2022 v.58 no.79 pp. 11079-11082
ISSN:
1364-548X
Subject:
formic acid,   etc   ; dehydrogenation; spectroscopy;     Show all 3 Subjects
Abstract:
... By applying a simple method on the generated gas concentration in the center of a round cell through high-speed stirring, we succeeded in continuously monitoring catalytic formic acid dehydrogenation using a newly developed in situ/operando UV-vis-diffuse-reflectance spectroscopy system, which can exhibit a high S/N ratio and reliable spectra without any mechanical errors from gas meters. ...
DOI:
10.1039/d2cc03768h

4. Pd-Catalyzed Regioselective Branched Hydrocarboxylation of Terminal Olefins with Formic Acid

Author:
Wenlong Ren; Mingzhou Wang; Jianqiong Guo; Jintao Zhou; Jianxiao Chu; Yuan Shi; Yian Shi
Source:
Organic letters 2022 v.24 no.3 pp. 886-891
ISSN:
1523-7052
Subject:
formic acid,   etc   ; ligands; regioselectivity; toxicity;     Show all 4 Subjects
Abstract:
... A regioselective Pd-catalyzed hydrocarboxylation of terminal olefins with HCOOH is described. A wide variety of branched carboxylic acids can readily be obtained with high regioselectivities under mild reaction conditions. The reaction is operationally simple and requires no handling of toxic CO. The ligand and LiCl are important factors for reaction reactivity and selectivity. ...
DOI:
10.1021/acs.orglett.1c04231

5. Development and validation of RP-HPLC method for 1΄-Acetoxychavicol acetate (ACA) and its application in optimizing the yield of ACA during its isolation from Alpinia galanga extract as well as its quantification in nanoemulsion

Author:
Arya Kadukkattil Ramanunny; Sheetu Wadhwa; Monica Gulati; Saurabh Gupta; Omji Porwal; Niraj Kumar Jha; Piyush Kumar Gupta; Deepak Kumar; Parteek Prasher; Kamal Dua; Ahmed Al Saqr; Saud Almawash; Sachin Kumar Singh
Source:
South African journal of botany 2022 v.149 pp. 887-898
ISSN:
0254-6299
Subject:
formic acid,   etc   ; Alpinia galanga; acetates; nanoemulsions; solvents;     Show all 5 Subjects
Abstract:
... An isocratic RP-HPLC was developed and validated for isolation of 1΄-Acetoxychavicol acetate (ACA) from Alpinia galanga extract (AGE). Nucleodur C18 column was used as the stationary phase and mixture of acetonitrile/0.1% formic acid in water (60/40, v/v) were used as mobile phase. The elution was carried out with a flow rate of 1 mL/min. Further, the method was validated as per ICH Q2 [R1] guidel ...
DOI:
10.1016/j.sajb.2021.10.012

6. Simultaneous CO₂ capture and functionalization: solvated electron precursors as novel catalysts

Author:
Benjamin A. Jackson; Evangelos Miliordos
Source:
Chemical communications 2022 v.58 no.9 pp. 1310-1313
ISSN:
1364-548X
Subject:
formic acid,   etc   ; carbon dioxide; ligands; quantum mechanics;     Show all 4 Subjects
Abstract:
... Metal complexes with diffuse solvated electrons (solvated electron precursors) are proposed as alternative catalysts for the simultaneous CO₂ capture and utilization. Quantum chemical calculations were used to study the reaction of CO₂ with H₂ and C₂H₄ to produce formic acid, methyldiol and δ-lactone. Mechanisms of a complete reaction pathway are found and activation barriers are reasonably low. T ...
DOI:
10.1039/d1cc04748e

7. Development and Validation of Highly Sensitive LC–ESI-MS/MS Method for Bortezomib and Its Applications for Plasma Levels and Drug Content of Branded and Generic Formulations in India

Author:
Lavisha Goel; Ujjalkumar Subhash Das; Pooja Gupta; Thirumurthy Velpandian; Lalit Kumar; Archana Singh; Kalpana Luthra; Yogendra Kumar Gupta
Source:
Chromatographia 2022 v.85 no.2 pp. 127-135
ISSN:
0009-5893
Subject:
formic acid,   etc   ; acetonitrile; drugs; myeloma; therapeutics; India;     Show all 6 Subjects
Abstract:
... In the present study, a highly sensitive and reproducible bio-analytical method was developed using LC–ESI-MS/MS to assess the lower plasma levels of bortezomib in multiple myeloma patients. The gradient elution was optimized using reverse-phase C18 column with mobile phases consisting of water and acetonitrile in 0.1% formic acid. Multiple reaction monitoring mode was used for quantification usin ...
DOI:
10.1007/s10337-021-04121-z

8. Dipyridylamine-acetamide (Dpaa): A primary amine protecting group orthogonally cleavable under acidic conditions in the presence of t-butyloxycarbonyl (Boc) and t-butylester

Author:
Aline L. Faucon; Françoise Hoegy; Noémie Werle; Christophe Gourlaouen; Gaëtan L.A. Mislin
Source:
Tetrahedron letters 2022 v.96 pp. 153758
ISSN:
0040-4039
Subject:
formic acid,   etc   ; hydrogen bonding; methylene chloride; nitrogen;     Show all 4 Subjects
Abstract:
... We show that dipyridylamine-acetamide (Dpaa), can be cleaved under mild acidic conditions (30% formic acid in dichloromethane). The release of the amine function is orthogonal to other acid-labile protecting groups. Calculations suggest that the ease of Dpaa cleavage relies on activation of the carbonyl function by the protonated dipyridylamine nitrogen and activation of a water molecule by a hydr ...
DOI:
10.1016/j.tetlet.2022.153758

9. Continuous hydrothermal furfural production from xylose in a microreactor with dual-acid catalysts

Author:
Tiprawee Tongtummachat; Attasak Jaree; Nattee Akkarawatkhoosith
Source:
RSC advances 2022 v.12 no.36 pp. 23366-23378
ISSN:
2046-2069
Subject:
formic acid,   etc   ; aluminum chloride; catalysts; furfural; temperature; xylose;     Show all 6 Subjects
Abstract:
... An effective continuous furfural production from xylose in a microreactor over dual-acid catalysts was proposed. In this work, furfural was synthesized in an organic solvent-free system using formic acid and aluminum chloride as catalyst. The role of these catalysts in the consecutive reactions was examined and verified. The influence of operating conditions including xylose concentration, reactio ...
DOI:
10.1039/d2ra03609f

10. Modulated construction of Fe-based MOF via formic acid modulator for enhanced degradation of sulfamethoxazole：Design, degradation pathways, and mechanism

Author:
Jian Sun; Jinquan Wan; Yan Wang; Zhicheng Yan; Yongwen Ma; Su Ding; Min Tang; Yongchang Xie
Source:
Journal of hazardous materials 2022 v.429 pp. 128299
ISSN:
0304-3894
Subject:
formic acid,   etc   ; advanced wastewater treatment; catalysts; catalytic activity;     Show all 4 Subjects
Abstract:
... Metal-organic frameworks (MOFs) have attracted more attention because of their excellent environmental catalytic capabilities. Modulation approach as an advanced assistant strategy is vital essential to enhancing the performance of MOFs. In this study, the modulated method was used to successfully synthesize a group of Fe-based MOFs, with formic acid as the modulator on the synthesis mixture. The ...
DOI:
10.1016/j.jhazmat.2022.128299

11. Pd(0)-Catalyzed Intramolecular Reductive Heck Reaction of Vinyl Iodide and Oxime Ether: Enantioselective Synthesis of Cyclic Allylic N-Alkoxy Amine

Author:
Ninglei Yang; Ming Dong; Xiaofeng Tong
Source:
Organic letters 2022 v.24 no.12 pp. 2457-2461
ISSN:
1523-7052
Subject:
formic acid,   etc   ; enantioselective synthesis; enantioselectivity; ligands; reducing agents;     Show all 5 Subjects
Abstract:
... Whereas the intramolecular reductive Heck reaction of aryl/vinyl halide and alkene has been well documented, the oxime analogue remains extremely elusive. Herein we report the Pd(0)-catalyzed intramolecular reductive Heck reaction of vinyl iodide and oxime ether with the use of formic acid as the reductant. It is found that the TsOH additive plays a crucial role in the reaction efficiency, and the ...
DOI:
10.1021/acs.orglett.2c00823

12. Process Development for the Instant Quantification of Lycopene from Agricultural Produces Using Supercritical Fluid Chromatography-Diode Array Detector (SFC-DAD)

Author:
Supriya Priyadarsani; Avinash Singh Patel; Yogesh Sharma; Abhijit Kar
Source:
Foods 2022 v.11 no.4 pp. -
ISSN:
2304-8158
Subject:
formic acid,   etc   ; Momordica charantia; grapefruits; horticulture; lycopene; temperature;     Show all 6 Subjects
Abstract:
... A quick, simple, and reliable isocratic ultra-performance supercritical fluid chromatography-photodiode array detector (UPSFC-DAD) method was developed and validated to determine lycopene in different horticultural products. The effects of stationary phase, co-solvent, pressure, temperature, flow rate, and mobile phase additive on the separation of lycopene were evaluated. The developed method inv ...
DOI:
10.3390/foods11040522

13. Cellulose I nanocrystals (CNCs I) prepared in mildly acidic lithium bromide trihydrate (MALBTH) and their application for stabilizing Pickering emulsions

Author:
Rui Chen; Zihao Ma; Dayin Sun; Xing Wang; Ying Han
Source:
International journal of biological macromolecules 2022 v.201 pp. 59-66
ISSN:
0141-8130
Subject:
formic acid,   etc   ; cellulose; crystal structure; hydrolysis; lithium; nanocrystals;     Show all 6 Subjects
Abstract:
... This study proposed a sustainable method to prepare cellulose I nanocrystals (CNCs I) from microcrystalline cellulose (MCC) in a mildly acidic lithium bromide trihydrate (MALBTH) system, a concentrated (50 wt%) solution of LiBr in water with recyclable formic acid (FA). First, the MCC was treated in the MALBTH system to generate CNCs with a uniform size, yield higher than 68.49% and crystallinity ...
DOI:
10.1016/j.ijbiomac.2021.12.110

14. Iridium-catalyzed chemoselective transfer hydrogenation of α, β-unsaturated ketones to saturated ketones in water

Author:
Xiaolan Jiang; Xiaofeng Cui; Jinxun Chen; Qixing Liu; Yongsheng Chen; Haifeng Zhou
Source:
Tetrahedron letters 2022 v.90 pp. 153627
ISSN:
0040-4039
Subject:
formic acid,   etc   ; chemoselectivity; hydrogen; hydrogenation; indans; iridium; ligands;     Show all 7 Subjects
Abstract:
... A chemoselective iridium-catalyzed transfer hydrogenation of α, β-unsaturated ketones was realized in water. The CC double bonds of 2-benzylidene indanones and analogues were hydrogenated exclusively catalyzed by an iridium complex (0.1 mol%) bearing a pyridine-imidazoline ligand, using a mixture of formic acid/triethyl amine (molar ratio: 5/2) as a hydrogen source in water. A series of 2-benzyl i ...
DOI:
10.1016/j.tetlet.2021.153627

15. An in situ derived MOF@In₂S₃ heterojunction stabilizes Co(ii)-salicylaldimine for efficient photocatalytic formic acid dehydrogenation

Author:
Meijin Zhang; Wenting Lin; Liang Ma; Yunhong Pi; Tiejun Wang
Source:
Chemical communications 2022 v.58 no.51 pp. 7140-7143
ISSN:
1364-548X
Subject:
formic acid,   etc   ; catalysts; dehydrogenation; hydrogen production; photocatalysis; semiconductors;     Show all 6 Subjects
Abstract:
... We report here the hierarchical construction of a molecular Co(ii)-salicylaldimine catalyst and an in situ derived In₂S₃ semiconductor in a MOF@In₂S₃ heterojunction through sequentially controllable in situ etching and post-synthetic modification for photocatalytic hydrogen production from formic acid. The enhanced catalyst stability and facilitated charge carrier mobility between the In₂S₃ photos ...
DOI:
10.1039/d2cc01969h

16. The reaction of Criegee intermediates with formamide and its implication to atmospheric aerosols

Author:
Yuanyuan Wei; Qingzhu Zhang; Xinxi Huo; Wenxing Wang; Qiao Wang
Source:
Chemosphere 2022 v.296 pp. 133717
ISSN:
0045-6535
Subject:
formic acid,   etc   ; air; climate; human health; reaction mechanisms;     Show all 5 Subjects
Abstract:
... The reactions of Criegee intermediates (CIs) play an important role in the formation of secondary organic aerosols that have negative effect on visibility, human health, and global climate. New particle formation (NPF) can contribute to more than half of the aerosols in terms of their number concentration. Here, the reactions of CIs with formamide (FA) in the gas-phase and at the air/water interfa ...
DOI:
10.1016/j.chemosphere.2022.133717

17. Au-nanorod-modified PCN-222(Cu) for H₂ evolution from HCOOH dehydrogenation by photothermally enhanced photocatalysis

Author:
Yao Wang; Xiaohua Wang; Haiyue Lu; Zhizhi Gu; Liyong Chen
Source:
Chemical communications 2022 v.58 no.61 pp. 8520-8523
ISSN:
1364-548X
Subject:
formic acid,   etc   ; carbon dioxide; dehydrogenation; hydrogen; liquids; nanorods; photocatalysis;     Show all 7 Subjects
Abstract:
... Formic acid molecules, which can be produced by reducing CO₂, are considered to be liquid organic hydrogen carriers. Herein, PCN-222(Cu) loaded with Au nanorods was prepared via following a seed-induced growth route, and it exhibited highly selective photocatalytic performance during H₂ generation (rate: 2.33 ± 0.12 mmol g⁻¹ h⁻¹, QY: 2.7 ± 0.14%) from HCOOH dehydrogenation, enhanced by plasmonic A ...
DOI:
10.1039/d2cc01141g

18. Single-atom catalysts: stimulating electrochemical CO₂ reduction reaction in the industrial era

Author:
Zedong Zhang; Dingsheng Wang
Source:
Journal of materials chemistry A 2022 v.10 no.11 pp. 5863-5877
ISSN:
2050-7496
Subject:
formic acid,   etc   ; carbon dioxide; carbon monoxide; catalytic activity; electrochemistry; industrialization;     Show all 6 Subjects
Abstract:
... Carbon monoxide and formic acid play a significant role in industrial processes and are exceedingly economical C₁ products in electrochemical CO₂ reduction reactions (ECR). To improve the yield and catalytic activity in ECR processes, numerous researchers have optimized catalysts and upgraded the electrolyzer. An increase in the electrocatalytic current density and production yield can significant ...
DOI:
10.1039/d1ta07778c

19. Tailor-designed nanowire-structured iron and nickel oxides on platinum catalyst for formic acid electro-oxidation

Author:
Bilquis Ali Al-Qodami; Hafsa H. Alalawy; Sayed Youssef Sayed; Islam M. Al-Akraa; Nageh K. Allam; Ahmad M. Mohammad
Source:
RSC advances 2022 v.12 no.31 pp. 20395-20402
ISSN:
2046-2069
Subject:
formic acid,   etc   ; catalysts; catalytic activity; iron; nanowires; nickel; oxygen; platinum;     Show all 8 Subjects
Abstract:
... This investigation is concerned with designing efficient catalysts for direct formic acid fuel cells. A ternary catalyst containing iron (nano-FeOx) and nickel (nano-NiOx) nanowire oxides assembled sequentially onto a bare platinum (bare-Pt) substrate was recommended for the formic acid electro-oxidation reaction (FAOR). While nano-NiOx appeared as fibrillar nanowire bundles (ca. 82 nm and 4.2 μm ...
DOI:
10.1039/d2ra03386k

20. Bimetallic palladium chromium nanoparticles anchored on amine-functionalized titanium carbides for remarkably catalytic dehydrogenation of formic acid at mild conditions

Author:
Zongji Zhang; Dawei He; Zhou Wang; Shaobo Wu; Tong Liu
Source:
Journal of catalysis 2022 v.410 pp. 121-127
ISSN:
0021-9517
Subject:
formic acid,   etc   ; catalytic activity; chromium; dehydrogenation; hydrogen production; palladium; titanium;     Show all 7 Subjects
Abstract:
... Heterogeneous catalysis of formic acid dehydrogenation is considered as a promising strategy for safe and efficient hydrogen production and transportation. Herein, we reported the immobilization of the bimetallic PdCr nanoparticles on amine-functionalized titanium carbides (PdCr/NH₂-MXene). By the amine group, the ultrafine PdCr NPs with the size of 1.8 nm were well dispersed on MXene. The optimiz ...
DOI:
10.1016/j.jcat.2022.04.021