Abstract
The use of flexible ligands in coordination polymers provides both opportunities and unpredictability. A new series of flexible ligands derived from p-xylylenediamine, which vary in the positioning of carboxylic acid functional groups, have been found to form a series of coordination polymers and a discrete coordination complex. Use of the tetra-substituted meta-carboxylic acid ligand N,N,N′,N′-tetra(3-carboxybenzyl)-p-xylylenediamine, isolated as its dihydrochloride salt (H 6 M 4 pxy)Cl 2 , resulted in the simultaneous formation of two products from the same synthetic conditions. One of these products was a discrete cage-type coordination complex of the form [Cu 4 (M 4 pxy) 2 (DMF) 2 (OH 2 )] (1), while the other product was the two-dimensional coordination polymer poly-[Cu 2 (M 4 pxy)(OH 2 ) 2 ] (2). Synthesis utilising the tetra-substituted para-carboxylic acid ligand, isolated as N,N,N′,N′-tetra(4-carboxybenzyl)-p-xylylenediamine dihydrochloride (H 6 P 4 pxy)Cl 2 , resulted in the formation of multiple two-dimensional coordination polymers, poly-[Cu 2 (P 4 pxy)(DMF)(OH 2 )]·2DMF·3H 2 O (3·2DMF·3H 2 O), poly-[Mn 2 (P 4 pxy)(DMA) 2 ] (4), poly-[Co 4 (P 4 pxy) 2 (DMF) 2 (μ-OH 2 ) 2 (OH 2 ) 2 ]·6DMF·4H 2 O (5·6DMF·4H 2 O) and poly-[Cd 2 (P 4 pxy)(OH 2 ) 2 ]·DMA·3H 2 O (6·DMA·3H 2 O). The last of these materials, a three-dimensional coordination polymer, was found to adsorb approximately 32 cm 3 g -1 STP of CO 2 at atmospheric pressure at 273 K.
| Original language | English |
|---|---|
| Pages (from-to) | 3074-3085 |
| Number of pages | 12 |
| Journal | CrystEngComm |
| Volume | 21 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - 1 Jan 2019 |
Keywords
- Chelation
- Ligands
- Atmospheric pressure
- Carboxylic acids
Cite this
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P -Xylylenediamine derived ligands as flexible connectors in the design of porous coordination polymers. / Emerson, Adrian J.; Knowles, Gregory P.; Chaffee, Alan L.; Batten, Stuart R.; Turner, David R.
In: CrystEngComm, Vol. 21, No. 19, 01.01.2019, p. 3074-3085.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - P -Xylylenediamine derived ligands as flexible connectors in the design of porous coordination polymers
AU - Emerson, Adrian J.
AU - Knowles, Gregory P.
AU - Chaffee, Alan L.
AU - Batten, Stuart R.
AU - Turner, David R.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - The use of flexible ligands in coordination polymers provides both opportunities and unpredictability. A new series of flexible ligands derived from p-xylylenediamine, which vary in the positioning of carboxylic acid functional groups, have been found to form a series of coordination polymers and a discrete coordination complex. Use of the tetra-substituted meta-carboxylic acid ligand N,N,N′,N′-tetra(3-carboxybenzyl)-p-xylylenediamine, isolated as its dihydrochloride salt (H 6 M 4 pxy)Cl 2 , resulted in the simultaneous formation of two products from the same synthetic conditions. One of these products was a discrete cage-type coordination complex of the form [Cu 4 (M 4 pxy) 2 (DMF) 2 (OH 2 )] (1), while the other product was the two-dimensional coordination polymer poly-[Cu 2 (M 4 pxy)(OH 2 ) 2 ] (2). Synthesis utilising the tetra-substituted para-carboxylic acid ligand, isolated as N,N,N′,N′-tetra(4-carboxybenzyl)-p-xylylenediamine dihydrochloride (H 6 P 4 pxy)Cl 2 , resulted in the formation of multiple two-dimensional coordination polymers, poly-[Cu 2 (P 4 pxy)(DMF)(OH 2 )]·2DMF·3H 2 O (3·2DMF·3H 2 O), poly-[Mn 2 (P 4 pxy)(DMA) 2 ] (4), poly-[Co 4 (P 4 pxy) 2 (DMF) 2 (μ-OH 2 ) 2 (OH 2 ) 2 ]·6DMF·4H 2 O (5·6DMF·4H 2 O) and poly-[Cd 2 (P 4 pxy)(OH 2 ) 2 ]·DMA·3H 2 O (6·DMA·3H 2 O). The last of these materials, a three-dimensional coordination polymer, was found to adsorb approximately 32 cm 3 g -1 STP of CO 2 at atmospheric pressure at 273 K.
AB - The use of flexible ligands in coordination polymers provides both opportunities and unpredictability. A new series of flexible ligands derived from p-xylylenediamine, which vary in the positioning of carboxylic acid functional groups, have been found to form a series of coordination polymers and a discrete coordination complex. Use of the tetra-substituted meta-carboxylic acid ligand N,N,N′,N′-tetra(3-carboxybenzyl)-p-xylylenediamine, isolated as its dihydrochloride salt (H 6 M 4 pxy)Cl 2 , resulted in the simultaneous formation of two products from the same synthetic conditions. One of these products was a discrete cage-type coordination complex of the form [Cu 4 (M 4 pxy) 2 (DMF) 2 (OH 2 )] (1), while the other product was the two-dimensional coordination polymer poly-[Cu 2 (M 4 pxy)(OH 2 ) 2 ] (2). Synthesis utilising the tetra-substituted para-carboxylic acid ligand, isolated as N,N,N′,N′-tetra(4-carboxybenzyl)-p-xylylenediamine dihydrochloride (H 6 P 4 pxy)Cl 2 , resulted in the formation of multiple two-dimensional coordination polymers, poly-[Cu 2 (P 4 pxy)(DMF)(OH 2 )]·2DMF·3H 2 O (3·2DMF·3H 2 O), poly-[Mn 2 (P 4 pxy)(DMA) 2 ] (4), poly-[Co 4 (P 4 pxy) 2 (DMF) 2 (μ-OH 2 ) 2 (OH 2 ) 2 ]·6DMF·4H 2 O (5·6DMF·4H 2 O) and poly-[Cd 2 (P 4 pxy)(OH 2 ) 2 ]·DMA·3H 2 O (6·DMA·3H 2 O). The last of these materials, a three-dimensional coordination polymer, was found to adsorb approximately 32 cm 3 g -1 STP of CO 2 at atmospheric pressure at 273 K.
KW - Chelation
KW - Ligands
KW - Atmospheric pressure
KW - Carboxylic acids
UR - http://www.scopus.com/inward/record.url?scp=85065830302&partnerID=8YFLogxK
U2 - 10.1039/c9ce00371a
DO - 10.1039/c9ce00371a
M3 - Article
VL - 21
SP - 3074
EP - 3085
JO - CrystEngComm
JF - CrystEngComm
SN - 1466-8033
IS - 19
ER -