Activation of epoxides as electrophiles by transition metal ions in dilute aqueous solution

1978 ◽  
Vol 100 (6) ◽  
pp. 1745-1749 ◽  
Author(s):  
Robert P. Hanzlik ◽  
Arlene Hamburg
Keyword(s):  
Aqueous Solution ◽  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Dilute Aqueous Solution

Complexation of o-phenylenediaminetetraacetic acid with some bivalent first-row transition-metal ions in aqueous solution

1985 ◽  
Vol 24 (1) ◽  
pp. 10-15 ◽  
Author(s):  
Noriyuki Nakasuka ◽  
Mihoko Kunimatsu ◽  
Kazunori Matsumura ◽  
Motoharu Tanaka
Keyword(s):  
Aqueous Solution ◽  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions

A bis-benzimidazole-derived N, S macrocycle as sensor for transition metal ions in aqueous solution

2001 ◽  
Vol 350 (3-4) ◽  
pp. 240-246 ◽  
Author(s):  
Mercedes Álvaro ◽  
Hermenegildo Garcı́a ◽  
Emilio Palomares ◽  
Redouane Achour ◽  
Ahmed Moussaif ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions

Technetium removal from the aqueous solution using zeolites A and Y containing transition metal ions Co2+ and Zn2+

2018 ◽  
Vol 317 (1) ◽  
pp. 215-225 ◽  
Author(s):  
Radmila V. Hercigonja ◽  
Sanja D. Vranješ-Djurić ◽  
Marija D. Mirković ◽  
Bojana M. Marković ◽  
Danijela D. Maksin ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions

scholarly journals Metallo-Supramolecular Hydrogels from the Copolymers of Acrylic Acid and 4-(2,2′:6′,2″-terpyridin-4′-yl)styrene

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1152 ◽  
Author(s):  
Huiqin Zhang ◽  
Pan Liu ◽  
Zheng Chi ◽  
Xuegang Chen
Keyword(s):  
Transition Metal ◽  
Acrylic Acid ◽  
Metal Ions ◽  
Self Assembly ◽  
Wavelength Region ◽  
Transition Metal Ions ◽  
Ion Concentration ◽  
Iron Ions ◽  
Absorption Intensity ◽  
Dilute Aqueous Solution

Hydrophilic copolymers containing 2,2′:6′,2″-terpyridine moieties and acrylic acid (AA) units poly (acrylic acid-co-4-(2,2′:6′,2″-terpyridin-4′-yl)styrene) (P(AA-co-TPY)) were synthesized and characterized. Coordinated with different transition metal ions, the dilute aqueous solution of the copolymers exhibited red-shifted UV-vis absorption peaks of π-π* transition from 317 to 340 nm. Further, interacting with iron ions, the copolymer showed new absorption peaks at a longer wavelength region (570 nm) and the absorption intensity enhanced with increase of the ion concentration. When enough ions were added to coordinate with the 2,2′:6′,2″-terpyridine moieties, novel metallo-supramolecular hydrogels were obtained due to the formation of metal coordination bonds between polymer back bones and transition metal ions (Ni2+, Zn2+, Cd2+, Fe2+ and Cu2+), which acted as self-assembly crosslinking structures. The mechanical strength and morphology of the resulting metallo-supramolecular hydrogels have been investigated.

Differential Photosensor Activities for the L-Cysteine and L-Serine Capped ZnS:Mn Nanocrystals in the Detection of Divalent Transition Metal Ions in Aqueous Solution

2020 ◽  
Vol 20 (11) ◽  
pp. 6723-6731
Author(s):  
Mi Choi ◽  
Cheong-Soo Hwang
Keyword(s):  
Aqueous Solution ◽  
Particle Size ◽  
Transition Metal ◽  
Metal Ions ◽  
Average Particle Size ◽  
Transition Metal Ions ◽  
Average Particle ◽  
Quenching Effect ◽  
Transmission Electron ◽  
Particle Size Analyzer

Colloidal ZnS:Mn nanocrystals (NCs) were synthesized in water by capping the NC surface with conventional amino acids: L-cysteine (Cys) and L-serine (Ser) molecules, which have very similar structures but different terminal functional groups. The optical properties were investigated by using UV-Visible and photoluminescence (PL) spectroscopy. The PL spectra for both ZnS:Mn-Cys and ZnS:Mn-Ser NCs showed broad emission peaks at 590 nm. The measured average particle size from the high-resolution transmission electron microscopy (HR-TEM) images were 4.38 nm (ZnS:Mn-Cys) and 5.57 nm (ZnS:Mn-Ser), which were also supported by Debye-Scherrer calculations. In addition, the surface charge of the NCs in aqueous solutions were measured using zeta-particle size analyzer spectroscopy, which showed formation of negatively charged surface for the ZnS:Mn-Cys (−43.93 mV) and ZnS:Mn-Ser (−8.21 mV) NCs in water. In this present study those negatively charged NCs were applied as photosensors for the detection of specific divalent transition metal cations in aqueous solution at the same condition. Consequently, the ZnS:Mn-Cys and ZnS:Mn-Ser NCs showed totally different photosensor activities upon the addition of first-row divalent transition metal ions. The former NCs showed luminescence quenching for most added metal ions except for Zn (II) ions; whereas the latter NCs showed exclusive quenching effect for Cu (II) ions at the same conditions. These results suggested that those NCs can be applied as Zn2+ and Cu2+ ion sensors in water.

Selective removal of transition metal ions from aqueous solution by metal–organic frameworks

RSC Advances ◽  
2015 ◽  
Vol 5 (88) ◽  
pp. 72107-72112 ◽  
Author(s):  
Yutian Zhang ◽  
Xudong Zhao ◽  
Hongliang Huang ◽  
Zhengjie Li ◽  
Dahuan Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Transition Metal ◽  
Metal Ions ◽  
Metal Organic Frameworks ◽  
Transition Metal Ions ◽  
Selective Removal ◽  
Carboxyl Groups ◽  
Separation Selectivity ◽  
Metal Organic ◽  
High Separation

Carboxyl groups in adjacent ligands in UiO-66(Zr)–2COOH exhibit specific capture performance for Cu2+, resulting in high separation selectivity for Cu2+/Ni2+.

Sign in / Sign up

Export Citation Format

Share Document