Theoretical exploration of stereochemical nonrigidity for R f Co(PF3) x (CO)4−x (R f =CF3, C2F5, C3F7, x=0–4)

Liu, Tingting; Lu, Xunyu; Zhang, Mingtao

doi:10.1007/s40242-014-4075-1

Cited by 18 publications

(26 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By contrast, the similar reaction of A with 1.5 equivalents of dppa afforded the asymmetrically dppa‐chelate complex Fe 2 ( μ ‐odt)(CO) 4 ( κ 2 ‐dppa) ( 2 ) in good yield (Scheme ), where two P atoms of the dppa ligand are both connected to a single iron atom. It is interesting to note that using Me 3 NO/MeCN as a mild condition, all‐carbonyl precursor A reacted with dppm to form a monodentate product but with dppa to give a chelate product, being consistent with the observation in the similar substitutions of diiron complexes with pdt, edt or adt bridges, possibly due to the larger P‐X‐P bite‐angle and more rigid one‐carbon backbone of dppm relative to dppa …”

Section: Resultssupporting

confidence: 79%

Reactions of Fe₂(μ‐odt)(CO)₆ (odt = 1, 3‐oxadithiolate) with small bite‐angle diphosphines to afford the monodentate, chelate, and bridge diiron complexes: Selective substitution, structures, protonation, and electrocatalytic proton reduction

Yang

Lǐ

et al. 2019

Applied Organom Chemis

View full text Add to dashboard Cite

Selective substitutions of Fe2(μ‐odt)(CO)6 (odt = 1,3‐oxadithiolate, A) and small bite‐angle diphosphines (Ph2P)2X [X = CH2 (dppm) or N (CH2CHMe2) (dppa)] have been well investigated in this study. With Me3NO·2H2O in MeCN at room temperature, the reaction of A and dppm produced the monodentate complex [Fe2(μ‐odt)(CO)5(κ1‐dppm)] (1), whereas the similar reaction with dppa afforded the chelate complex [Fe2(μ‐odt)(CO)4(κ2‐dppa)] (2). Using UV irradiation in toluene emitting at 365 nm, the treatment of A and dppm rarely resulted in the formation of the bridge complex [Fe2(μ‐odt)(CO)4(μ‐dppm)] (3), whereas the similar treatment with dppa formed the chelate complex 2. Under thermolysis condition, refluxing solution of A with dppm or dppa gave the bridge complex 3 and [Fe2(μ‐odt)(CO)4(μ‐dppa)] (4), respectively, in which the former was formed in toluene (110 °C) but the latter was produced in xylene (138 °C). All the new complexes 1–4 obtained above were characterized by element analysis, FT‐IR, NMR (1H, 31P) spectroscopies, and particularly for 1–3 by X‐ray crystallography. Furthermore, the in situ protonations of 2 with a weak acid HOAc (acetic acid) and a strong acid TFA (trifluoroacetic acid) are explored by means of FT‐IR and NMR (1H, 31P) spectra. In addition, the electrochemical behaviors of 2–4 are studied and compared through cyclic voltammetry (CV) in the absence and presence of a strong acid (TFA) as a proton source, indicating that they all are active for electrocatalytic proton reduction to hydrogen (H2).

show abstract

Section: Resultssupporting

confidence: 79%

Reactions of Fe₂(μ‐odt)(CO)₆ (odt = 1, 3‐oxadithiolate) with small bite‐angle diphosphines to afford the monodentate, chelate, and bridge diiron complexes: Selective substitution, structures, protonation, and electrocatalytic proton reduction

Yang

Lǐ

et al. 2019

Applied Organom Chemis

View full text Add to dashboard Cite

show abstract

“…There are lots of ways to synthesize Fe 3 O 4 nanoparticles with different sizes and morphologies [14][15][16] . For the above reasons, rGO-Fe 3 O 4 would be an ideal absorbent combining the merits of adsorption properties of rGO with the easy separation of magnetic nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

One-pot hydrothermal synthesis of rGO-Fe3O4 hybrid nanocomposite for removal of Pb(II) via magnetic separation

Cao

Zhou

et al. 2015

Chem. Res. Chin. Univ.

View full text Add to dashboard Cite

The reduced graphene oxide-Fe 3 O 4 (rGO-Fe 3 O 4 ) hybrid nanocomposite was prepared via a one-pot facile hydrothermal method for adsorption of heavy metal ions. The results of compositional and morphological characterizations show that the Fe 3 O 4 NPs with an average diameter of 20 nm have been uniformly dispersed in rGO sheets. Due to the higher specific surface area of rGO and the magnetic properties of Fe 3 O 4 nanoparticles, the prepared rGO-Fe 3 O 4 hybrid nanosheets showed good adsorption capacity for the removal of Pb(II) from wastewater by simple magnetic separation. The result of control tests show that the adsorption capacity of rGO-Fe 3 O 4 can be influenced by the ratio of ferric chloride(FeCl 3 ) to graphene oxide(GO) during the process of sample preparation and the initial concentration of Pb(II). A better adsorption capacity was 30.68 mg/g at n(FeCl 3 )/m(GO) ratio of 1:5(mmol:mg) at pH=7.0 with the initial concentration of Pb(II) ions of 80 mg/L, and the experimental data were well fitted with the Langmuir adsorption model. The composite with absorbed Pb(II) can be easily collected by magnetic separation from wastewater because of the excellent magnetism of Fe 3 O 4 NPs. The rGO-Fe 3 O 4 hybrid nanocomposite provides an effective and environment-friendly absorbent with great application potential in water purification.

show abstract

“…But several researchers also used SDS to form w/o emulsions. [30,31] So far, no comparative studies have been conducted on the use of different surfactants (non-ionic vs ionic) in emulsion preparation for electrospinning. In the current investigation, the effects of different surfactants on the evolution of core-shell structures of electrospun fibres were studied.…”

Section: Discussionmentioning

confidence: 99%

Formation of Core–Shell Structures in Emulsion Electrospun Fibres: A Comparative Study

Wang

2014

Aust. J. Chem.

View full text Add to dashboard Cite

Electrospinning has attracted great attention in recent years from different industries including biomedical engineering. Owing to the relative ease of fabricating ultrafine fibres with core-shell structures, emulsion electrospinning has been investigated intensively for making nanofibrous delivery vehicles for local and sustained release of bioactive or therapeutic substances, especially biomolecules such as growth factors. In preparing emulsions for electrospinning, different surfactants, ionic or non-ionic, can be used, which may subsequently influence the evolution of the core-shell structure in the electrospun emulsion jet or fibre. In this investigation, emulsions consisting of deionized water or phosphate buffer saline as the water phase, a poly(lactic-co-glycolic acid) solution as the oil phase and Span 80 (a non-ionic surfactant) or sodium dodecyl sulfate (an ionic surfactant) were electrospun into fibres for studying the core-shell structure and its evolution in emulsion electrospun fibres. Different microscopies were employed to study the morphological changes of the water phase in fibre samples collected at different locations along the jet (or fibre) trajectory during emulsion electrospinning. It was found that the evolution of the fibre core-shell structure was significantly different when different surfactants were used. If Span 80 was the surfactant, the water phase within the thick emulsion jet (or fibre) close to the Taylor cone existed in a discrete state whereas in ultrafine fibres collected beyond a certain distance from the Taylor cone, a mostly continuous water-phase core was observed. If sodium dodecyl sulfate was the surfactant, the core-shell structure in the thick jet (or fibre) was irregular but relatively continuous. A single core core-shell structure was eventually developed in ultrafine fibres. The core-shell structure in electrospun fibres and its evolution were also affected by the emulsion composition (e.g. polymer solution concentration, water-phase volume, and ion addition in the water phase).

show abstract

Theoretical exploration of stereochemical nonrigidity for R f Co(PF3) x (CO)4−x (R f =CF3, C2F5, C3F7, x=0–4)

Cited by 18 publications

References 36 publications

Reactions of Fe₂(μ‐odt)(CO)₆ (odt = 1, 3‐oxadithiolate) with small bite‐angle diphosphines to afford the monodentate, chelate, and bridge diiron complexes: Selective substitution, structures, protonation, and electrocatalytic proton reduction

Reactions of Fe₂(μ‐odt)(CO)₆ (odt = 1, 3‐oxadithiolate) with small bite‐angle diphosphines to afford the monodentate, chelate, and bridge diiron complexes: Selective substitution, structures, protonation, and electrocatalytic proton reduction

One-pot hydrothermal synthesis of rGO-Fe3O4 hybrid nanocomposite for removal of Pb(II) via magnetic separation

Formation of Core–Shell Structures in Emulsion Electrospun Fibres: A Comparative Study

Contact Info

Product

Resources

About

Theoretical exploration of stereochemical nonrigidity for R f Co(PF3) x (CO)4−x (R f =CF3, C2F5, C3F7, x=0–4)

Cited by 18 publications

References 36 publications

Reactions of Fe2(μ‐odt)(CO)6 (odt = 1, 3‐oxadithiolate) with small bite‐angle diphosphines to afford the monodentate, chelate, and bridge diiron complexes: Selective substitution, structures, protonation, and electrocatalytic proton reduction

Reactions of Fe2(μ‐odt)(CO)6 (odt = 1, 3‐oxadithiolate) with small bite‐angle diphosphines to afford the monodentate, chelate, and bridge diiron complexes: Selective substitution, structures, protonation, and electrocatalytic proton reduction

One-pot hydrothermal synthesis of rGO-Fe3O4 hybrid nanocomposite for removal of Pb(II) via magnetic separation

Formation of Core–Shell Structures in Emulsion Electrospun Fibres: A Comparative Study

Contact Info

Product

Resources

About

Reactions of Fe₂(μ‐odt)(CO)₆ (odt = 1, 3‐oxadithiolate) with small bite‐angle diphosphines to afford the monodentate, chelate, and bridge diiron complexes: Selective substitution, structures, protonation, and electrocatalytic proton reduction

Reactions of Fe₂(μ‐odt)(CO)₆ (odt = 1, 3‐oxadithiolate) with small bite‐angle diphosphines to afford the monodentate, chelate, and bridge diiron complexes: Selective substitution, structures, protonation, and electrocatalytic proton reduction