The lanthanide contraction effect and organic additives impact the coordination structures of lanthanide ions with symmetrical octamethyl-substituted cucurbit[6]uril ligands

CrystEngComm ◽  
2019 ◽  
Vol 21 (37) ◽  
pp. 5641-5649 ◽  
Author(s):  
Rui-Lian Lin ◽  
Jia-Jia Zhou ◽  
Fu Hou Zhou ◽  
Wen-Qi Sun ◽  
Jing-Xin Liu ◽  
...  
Keyword(s):  
Lanthanide Ions ◽  
Organic Additives ◽  
Lanthanide Contraction ◽  
Contraction Effect

Two facts, the lanthanide contraction effect and the “bridge” role of organic additives, impact the coordination structures of lanthanide ions with OMeQ[6] ligands.

Bond-length distributions for ions bonded to oxygen: Results for the lanthanides and actinides and discussion of the f-block contraction

2017 ◽  
Author(s):  
Olivier Charles Gagné
Keyword(s):  
Bond Length ◽  
Coordination Number ◽  
Lanthanide Ions ◽  
Lanthanide Contraction ◽  
Trivalent Lanthanide ◽  
Actinide Ions

Bond-length distributions have been examined for eighty-four configurations of the lanthanide ions and twenty-two configurations of the actinide ions bonded to oxygen. The lanthanide contraction for the trivalent lanthanide ions bonded to O<sup>2-</sup> is shown to vary as a function of coordination number and to diminish in scale with increasing coordination number.

Coordination complexes based on pentacyclohexanocucurbit[5]uril and lanthanide(iii) ions: lanthanide contraction effect induced structural variation

CrystEngComm ◽  
2012 ◽  
Vol 14 (20) ◽  
pp. 6983 ◽  
Author(s):  
Jing-Xin Liu ◽  
Ying-Feng Hu ◽  
Rui-Lian Lin ◽  
Wen-Qi Sun ◽  
Xiang-Feng Chu ◽  
...  
Keyword(s):  
Structural Variation ◽  
Coordination Complexes ◽  
Lanthanide Contraction ◽  
Contraction Effect

The Role of Electrolyte’s Organic Additives in Zinc-Air Batteries

2021 ◽  
Author(s):  
Hamed Pourzolfaghar ◽  
Soraya Hosseini ◽  
Marziyeh Alinejad
Keyword(s):  
State Of The Art ◽  
Cost Effective ◽  
The State ◽  
Commercial Application ◽  
Organic Additives ◽  
P Addition ◽  
Zinc Air Batteries

Addition of the organic additives to the electrolyte is one of the state-of-the-art and cost-effective solutions to develop an appropriate rechargeable ZABs able to be promoted towards commercial application. In this mini review, some of the most important organic additives have been reviewed and their functions in the zinc air batteries have been investigated.

scholarly journals Differentiating the role of organic additives to assemble open framework aluminosilicates using INS spectroscopy

2020 ◽  
Vol 22 (25) ◽  
pp. 14177-14186
Author(s):  
Antony Nearchou ◽  
Jeff Armstrong ◽  
Keith T. Butler ◽  
Paul R. Raithby ◽  
Asel Sartbaeva
Keyword(s):  
Crown Ether ◽  
Organic Additives ◽  
Open Framework

Uneasy lies a pore that bears a crown – INS study on crown-ether containing zeolites.

Macrocycle-based metal ion complexation: a study of the lanthanide contraction effect towards hexacyclohexanocucurbit[6]uil

CrystEngComm ◽  
2013 ◽  
Vol 15 (4) ◽  
pp. 738-744 ◽  
Author(s):  
Xiao Qin ◽  
Xin-Long Ni ◽  
Jing-Xu Hu ◽  
Kai Chen ◽  
Yun-Qian Zhang ◽  
...  
Keyword(s):  
Metal Ion ◽  
Metal Ion Complexation ◽  
Lanthanide Contraction ◽  
Ion Complexation ◽  
Contraction Effect

Role of organic additives on zinc plating

2006 ◽  
Vol 201 (6) ◽  
pp. 3438-3442 ◽  
Author(s):  
B. Kavitha ◽  
P. Santhosh ◽  
M. Renukadevi ◽  
A. Kalpana ◽  
P. Shakkthivel ◽  
...  
Keyword(s):  
Organic Additives ◽  
Zinc Plating

The role of g electrons in the optical spectroscopy of lanthanide ions in crystals

1985 ◽  
Vol 18 (33) ◽  
pp. L1063-L1066 ◽  
Author(s):  
P C Becker ◽  
N Edelstein ◽  
B R Judd ◽  
R C Leavitt ◽  
G M S Lister
Keyword(s):  
Optical Spectroscopy ◽  
Lanthanide Ions

Role of kallikrein-kininogen system in insulin-stimulated glucose transport after muscle contractions

2002 ◽  
Vol 92 (2) ◽  
pp. 657-664 ◽  
Author(s):  
C. L. Dumke ◽  
J. Kim ◽  
E. B. Arias ◽  
G. D. Cartee
Keyword(s):  
Glucose Transport ◽  
Serum Proteins ◽  
Muscle Contractions ◽  
Rat Serum ◽  
Serum Free ◽  
Bradykinin Receptor ◽  
Contraction Effect ◽  
Kallikrein Inhibitors

Serum proteins [molecular weight (MW) > 10,000] are essential for increased insulin-stimulated glucose transport after in vitro muscle contractions. We investigated the role of the kallikrein-kininogen system, including bradykinin, which is derived from kallikrein (MW > 10,000)-catalyzed degradation of serum protein kininogen (MW > 10,000), on this contraction effect. In vitro electrical stimulation of rat epitrochlearis muscles was performed in 1) rat serum ± kallikrein inhibitors; 2) human plasma (normal or kallikrein-deficient); 3) rat serum ± bradykinin receptor-2 inhibitors; or 4) serum-free buffer ± bradykinin. 3- O-methylglucose transport (3-MGT) was measured 3.5 h later. Serum ± kallikrein inhibitors tended ( P = 0.08) to diminish postcontraction insulin-stimulated 3-MGT. Contractions in normal plasma enhanced insulin-stimulated 3-MGT vs. controls, but contractions in kallikrein-deficient plasma did not. Supplementing rat serum with bradykinin receptor antagonist HOE-140 during contraction did not alter insulin-stimulated 3-MGT. Muscles stimulated to contract in serum-free buffer plus bradykinin did not have enhanced insulin-stimulated 3-MGT. Bradykinin was insufficient for postcontraction-enhanced insulin sensitivity. However, results with kallikrein inhibitors and kallikrein-deficient plasma suggest kallikrein plays a role in this improved insulin action.

scholarly journals A series of lanthanide glutarates: lanthanide contraction effect on crystal frameworks of lanthanide glutarates

RSC Advances ◽  
2017 ◽  
Vol 7 (29) ◽  
pp. 17934-17940 ◽  
Author(s):  
Xiao-Feng Tan ◽  
Jian Zhou ◽  
Hua-Hong Zou ◽  
Lianshe Fu ◽  
Qiuling Tang ◽  
...  
Keyword(s):  
Structural Type ◽  
Lanthanide Contraction ◽  
Contraction Effect

Although some 3-D lanthanide glutarates have been reported, they exhibit a very robust structural type, whose structure is not changed by different Ln3+ ions, but compound 3 shows a new structural type.

scholarly journals Intrinsic Flexibility of the EMT Zeolite Framework Under Pressure

2019 ◽  
Author(s):  
Antony Nearchou ◽  
Mero-Lee U. Cornelius ◽  
Jonathan M. Skelton ◽  
Zoe Jones ◽  
Andrew Cairns ◽  
...  
Keyword(s):  
Free Energy ◽  
Computational Modelling ◽  
Lattice Energy ◽  
Vibrational Entropy ◽  
Organic Additives ◽  
X Ray Diffraction ◽  
Zeolite Framework ◽  
Guest Molecules ◽  
Fau Zeolite

<p>The roles of organic additives in the assembly and crystallisation of zeolites is still not fully understood. This is important when attempting to prepare novel frameworks to produce new zeolites. We consider 18-crown-6 ether as an additive, which has previously been shown to differentiate between the EMT and FAU zeolite frameworks. However, it is unclear whether this distinction is dictated by influences on the metastable free-energy landscape or geometric templating. Using high pressure synchrotron X-ray diffraction, we have observed that the presence of 18C6 does not impact the EMT framework flexibility – agreeing with our previous geometric simulations and suggesting that 18C6 does not behave as a true geometric template. This was further studied with computational modelling, using first-principles comparative periodic DFT and lattice-dynamics calculations. It is shown that the lattice energy of FAU is more stable than EMT, however this is strongly impacted by the presence of solvent/guest molecules in the framework. Furthermore, the EMT topology possesses a greater vibrational entropy, being stabilised by free energy at finite temperature. Overall, these findings demonstrate that the role of the 18C6 additive is to influence the free-energy of crystallisation to assemble the EMT framework as opposed to FAU. </p>

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