One-dimensional polymeric carbon structure based on five-membered rings in alkaline earth metal dicarbidesBeC2andMgC2

2010 ◽  
Vol 82 (12) ◽  
Author(s):  
Pornjuk Srepusharawoot ◽  
Andreas Blomqvist ◽  
C. Moysés Araújo ◽  
Ralph H. Scheicher ◽  
Rajeev Ahuja
Keyword(s):  
Alkaline Earth ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
Carbon Structure ◽  
One Dimensional ◽  
Polymeric Carbon

Magnesium, calcium and strontium salts of phenylacetic acid

2012 ◽  
Vol 68 (2) ◽  
pp. m29-m33 ◽  
Author(s):  
Jean-Baptiste Arlin ◽  
Alan R. Kennedy ◽  
Kenneth Shankland
Keyword(s):  
Alkaline Earth ◽  
Phenylacetic Acid ◽  
Bound Water ◽  
Earth Metal ◽  
Metal Salts ◽  
Alkaline Earth Metal ◽  
One Dimensional ◽  
Structural Types ◽  
Polymeric Chains ◽  
Inorganic Layers

Three alkaline earth metal salts of phenylacetic acid were examined and all were found to have similar structural types to analogous salts of benzoic and halobenzoic acids. Thus, a synchrotron study shows that the cations incatena-poly[[[tetraaquamagnesium(II)]-μ-phenylacetato-κ2O:O′] phenylacetate], {[Mg(C8H7O2)(H2O)4](C8H7O2)}n, form a one-dimensional coordination polymer that propagates through Mg—O—C—O—Mg interactions involving both crystallographically independent Mg centres (Z′ = 2) and through translation along theaaxis. The polymeric chains pack to give alternate inorganic layers and organic bilayers. The Ca and Sr speciescatena-poly[[[diaqua(phenylacetato-κ2O,O′)calcium(II)]-μ3-phenylacetato-1′:1:1′′κ4O:O,O′:O′] monohydrate], {[Ca(C8H7O2)2(H2O)2]·H2O}n, andcatena-poly[[[diaqua(phenylacetato-κ2O,O′)strontium(II)]-μ3-phenylacetato-1′:1:1′′κ4O:O,O′:O′] monohydrate], {[Sr(C8H7O2)2(H2O)2]·H2O}n, are essentially isostructural. Both form one-dimensional coordination polymers through a carboxylate group that forms fourM—O bonds. The polymeric chains propagatevia21screw axes parallel to thebaxis and are further linked in thebcplane by hydrogen bonding involving the non-metal-bound water molecule. Similarly to the Mg salt, both have inorganic layers that alternate with organic bilayers.

Alkaline earth metal salts of 1-naphthoic acid

2012 ◽  
Vol 68 (8) ◽  
pp. m213-m218 ◽  
Author(s):  
Jean-Baptiste Arlin ◽  
Alan R. Kennedy
Keyword(s):  
Alkaline Earth ◽  
Earth Metal ◽  
Metal Salts ◽  
Alkaline Earth Metal ◽  
Carboxylate Group ◽  
One Dimensional ◽  
Naphthoic Acid ◽  
Polymeric Chains ◽  
The Common ◽  
Channel Structures

The structures of the Mg, Ca, Sr and Ba salts of 1-naphthoic acid are examined and compared with analogous structures of salts of benzoate derivatives. It is shown thatcatena-poly[[[diaquabis(1-naphthoato-κO)magnesium(II)]-μ-aqua] dihydrate], {[Mg(C11H7O2)2(H2O)3]·2H2O}n, exists as a one-dimensional coordination polymer that propagates only through Mg—OH2—Mg interactions along the crystallographicbdirection. In contrast with related benzoate salts, the naphthalene systems are large enough to prevent inorganic chain-to-chain interactions, and thus species with inorganic channels rather than layers are formed. The Ca, Sr and Ba salts all have metal centres that lie on a twofold axis (Z′ = 1 \over 2) and all have the common namecatena-poly[[diaquametal(II)]-bis(μ-1-naphthoato)-κ3O,O′:O;κ3O:O,O′], [M(C11H7O2)2(H2O)2]n, whereM= Ca, Sr or Ba. The Ca and Sr salts are essentially isostructural, and all three species form one-dimensional coordination polymers through a carboxylate group that forms threeM—O bonds. The polymeric chains propagatevia c-glide planes and throughMOMO four-membered rings. Again, inorganic channel structures are formed rather than layered structures, and the three structures are similar to those found for Ca and Sr salicylates and other substituted benzoates.

Impact of Alkaline Earth Metal Doping on the Stability of Perovskite Solar Cells

2019 ◽  
Author(s):  
Nga Phung ◽  
Hans Köbler ◽  
Diego Di Girolamo ◽  
Thi Tuyen Ngo ◽  
Gabrielle Sousa e Silva ◽  
...  
Keyword(s):  
Solar Cells ◽  
Alkaline Earth ◽  
Perovskite Solar Cells ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
Metal Doping ◽  
The Stability
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