metal-organic compounds
catena-Poly[1,2,2-trimethylcyclopentane-1,3-diammonium [aluminate(III)-μ-(hydrogen phosphato)-μ-phosphato]]
aDepartment of Chemistry, Bengbu Medical College, Bengbu 233030, People's Republic of China
*Correspondence e-mail: liangjyt@163.com
In the title compound, {(C8H20N2)[Al(HPO4)(PO4)]}n, the AlIII atom is coordinated by four O atoms from two HPO42− and two PO43− groups in a distorted tetrahedral geometry. Each AlO4 unit shares four O atoms with four adjacent PO4 units, leading to an anionic chain along [100]. The negative charge of the chain is compensated by doubly protonated camphoric amine cations. N—H⋯O hydrogen bonds connect the cations and the anionic chains. O—H⋯O hydrogen bonds are present in the chain.
Related literature
For the synthesis and applications of chiral inorganic framework materials, see: Viter & Nagornyi (2009). For information about aluminophosphate chains, see: Jones et al. (1990); Oliver et al. (1998); Williams et al. (1997).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2007); cell SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 1999); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
Supporting information
https://doi.org/10.1107/S1600536812028826/hy2556sup1.cif
contains datablocks global, I. DOI:Supporting information file. DOI: https://doi.org/10.1107/S1600536812028826/hy2556Isup2.mol
Supporting information file. DOI: https://doi.org/10.1107/S1600536812028826/hy2556Isup3.cdx
Supporting information file. DOI: https://doi.org/10.1107/S1600536812028826/hy2556Isup5.cdx
Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536812028826/hy2556Isup4.hkl
A mixture of aluminium isopropoxide (204 mg, 1 mmol), water (720 mg, 40 mmol), 85% H3PO4 (254 mg, 2.2 mmol), camphoric amine (143 mg, 1 mmol) and HF (13.0 mg, 0.65 mmol) was stirred to form a gel. The gel was sealed in a Teflon-lined stainless-steel autoclave and heated at 180°C for 10 days. Colorless crystals were collected by filtration, washed with distilled water and dried in air.
H atoms on C and N atoms were positioned geometrically and refined as riding atoms, with C—H = 0.98 (CH), 0.97 (CH2) and 0.96 (CH3) Å and N—H = 0.89 Å and with Uiso(H) = 1.2(1.5 for methyl and ammonium)Ueq(C,N). Hydroxyl H atom was located from a difference Fourier map and refined as riding, with O—H = 0.96 Å and Uiso(H) = 1.5Ueq(O).
There are considerable interests in the synthesis of chiral inorganic framework materials for their potential applications in separation and catalysis (Viter & Nagornyi, 2009). Our interest is particularly focused on the synthesis of microporous aluminophosphate. We used organic camphoric amine as the template and hydrothermally synthesized the title compound (Fig. 1).
The structure consists of aluminophosphate chains of formula [Al(HPO4)(PO4)]n, running along the a axis, and doubly protonated camphoric amine cations (Fig. 2). The chain is constructed from AlO4 tetrahedra and PO4 tetrahedra. Each AlO4 tetrahedron shares four O atoms with adjacent PO4 tetrahedra, whereas each PO4 tetrahedron shares two O atoms with adjacent AlO4 tetrahedra, leaving the other two O atoms terminal. The structure denotes that AlPO-CSC (Corner-Sharing Chain) is one of the fundamental chains in the known aluminophosphate compounds (Jones et al., 1990; Oliver et al., 1998; Williams et al., 1997). The negative charge of the chain is compensated by protonated organic camphoric amine cations, which are connected to the chains through N—H···O hydrogen bonds (Table 1).
For the synthesis and applications of chiral inorganic framework materials, see: Viter & Nagornyi (2009). For information about aluminophosphate chains, see: Jones et al. (1990); Oliver et al. (1998); Williams et al. (1997).
Data collection: SMART (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 1999); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).Fig. 1. The asymmetric unit of the title compound. Displacement ellipsoids are drawn at the 50% probability level. | |
Fig. 2. The anionic chain and camphoric amine cation in the title compound. |
(C8H20N2)[Al(HPO4)(PO4)] | F(000) = 760 |
Mr = 362.19 | Dx = 1.696 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 2335 reflections |
a = 8.0102 (10) Å | θ = 2.3–22.7° |
b = 16.862 (2) Å | µ = 0.41 mm−1 |
c = 10.5164 (12) Å | T = 293 K |
β = 93.203 (2)° | Block, colourless |
V = 1418.2 (3) Å3 | 0.22 × 0.19 × 0.18 mm |
Z = 4 |
Bruker APEX CCD diffractometer | 3386 independent reflections |
Radiation source: fine-focus sealed tube | 2442 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.078 |
φ and ω scans | θmax = 28.2°, θmin = 2.3° |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | h = −10→10 |
Tmin = 0.915, Tmax = 0.930 | k = −18→22 |
8701 measured reflections | l = −13→11 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.041 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.098 | H-atom parameters constrained |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0302P)2] where P = (Fo2 + 2Fc2)/3 |
3386 reflections | (Δ/σ)max = 0.001 |
195 parameters | Δρmax = 0.47 e Å−3 |
0 restraints | Δρmin = −0.47 e Å−3 |
(C8H20N2)[Al(HPO4)(PO4)] | V = 1418.2 (3) Å3 |
Mr = 362.19 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 8.0102 (10) Å | µ = 0.41 mm−1 |
b = 16.862 (2) Å | T = 293 K |
c = 10.5164 (12) Å | 0.22 × 0.19 × 0.18 mm |
β = 93.203 (2)° |
Bruker APEX CCD diffractometer | 3386 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | 2442 reflections with I > 2σ(I) |
Tmin = 0.915, Tmax = 0.930 | Rint = 0.078 |
8701 measured reflections |
R[F2 > 2σ(F2)] = 0.041 | 0 restraints |
wR(F2) = 0.098 | H-atom parameters constrained |
S = 1.02 | Δρmax = 0.47 e Å−3 |
3386 reflections | Δρmin = −0.47 e Å−3 |
195 parameters |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. |
x | y | z | Uiso*/Ueq | ||
Al1 | 0.23800 (9) | 0.51205 (4) | 0.94544 (6) | 0.01494 (17) | |
C1 | 0.1616 (3) | 0.26568 (17) | 0.7028 (3) | 0.0337 (7) | |
H1D | 0.0959 | 0.2257 | 0.7416 | 0.051* | |
H1E | 0.1789 | 0.3094 | 0.7606 | 0.051* | |
H1F | 0.2678 | 0.2437 | 0.6833 | 0.051* | |
C2 | 0.1662 (3) | 0.36187 (15) | 0.5190 (2) | 0.0223 (5) | |
H2 | 0.1159 | 0.3716 | 0.4333 | 0.027* | |
C3 | 0.0691 (3) | 0.29490 (14) | 0.5794 (2) | 0.0214 (5) | |
C4 | 0.0404 (4) | 0.22449 (17) | 0.4892 (3) | 0.0385 (7) | |
H4A | −0.0082 | 0.2429 | 0.4090 | 0.058* | |
H4B | −0.0340 | 0.1873 | 0.5258 | 0.058* | |
H4C | 0.1452 | 0.1991 | 0.4761 | 0.058* | |
C5 | −0.0927 (3) | 0.34152 (15) | 0.6070 (2) | 0.0215 (5) | |
C6 | −0.2124 (3) | 0.34974 (16) | 0.4893 (2) | 0.0270 (6) | |
H6A | −0.2663 | 0.2998 | 0.4714 | 0.041* | |
H6B | −0.1509 | 0.3654 | 0.4177 | 0.041* | |
H6C | −0.2953 | 0.3892 | 0.5049 | 0.041* | |
C7 | −0.0302 (3) | 0.42256 (15) | 0.6572 (2) | 0.0253 (6) | |
H7A | −0.1081 | 0.4642 | 0.6305 | 0.030* | |
H7B | −0.0179 | 0.4222 | 0.7495 | 0.030* | |
C8 | 0.1363 (3) | 0.43549 (16) | 0.6010 (3) | 0.0341 (7) | |
H8B | 0.2241 | 0.4408 | 0.6678 | 0.041* | |
H8A | 0.1340 | 0.4831 | 0.5491 | 0.041* | |
N1 | 0.3491 (2) | 0.34899 (12) | 0.50846 (18) | 0.0210 (5) | |
H1A | 0.4045 | 0.3681 | 0.5775 | 0.031* | |
H1B | 0.3826 | 0.3739 | 0.4397 | 0.031* | |
H1C | 0.3695 | 0.2973 | 0.5019 | 0.031* | |
N2 | −0.1918 (2) | 0.30479 (12) | 0.70978 (18) | 0.0229 (5) | |
H2A | −0.2803 | 0.3350 | 0.7231 | 0.034* | |
H2B | −0.1277 | 0.3011 | 0.7814 | 0.034* | |
H2C | −0.2258 | 0.2566 | 0.6854 | 0.034* | |
O2 | 0.3899 (2) | 0.51208 (10) | 0.83594 (16) | 0.0248 (4) | |
O3 | 0.5465 (2) | 0.42016 (10) | 0.69810 (15) | 0.0258 (4) | |
O4 | 0.6755 (2) | 0.46404 (10) | 0.90504 (15) | 0.0236 (4) | |
O5 | 0.6361 (2) | 0.56178 (11) | 0.72750 (15) | 0.0257 (4) | |
H5B | 0.7125 | 0.5872 | 0.7881 | 0.039* | |
O6 | −0.1454 (2) | 0.58055 (10) | 1.04650 (15) | 0.0256 (4) | |
O7 | −0.1712 (2) | 0.65708 (10) | 0.84337 (15) | 0.0240 (4) | |
O8 | 0.0256 (2) | 0.70185 (10) | 1.02657 (15) | 0.0238 (4) | |
O9 | 0.0880 (2) | 0.58103 (10) | 0.89830 (16) | 0.0246 (4) | |
P1 | 0.56043 (8) | 0.48755 (4) | 0.78985 (6) | 0.01633 (16) | |
P2 | −0.04921 (8) | 0.63267 (4) | 0.95434 (6) | 0.01681 (16) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Al1 | 0.0163 (4) | 0.0119 (4) | 0.0167 (4) | 0.0005 (3) | 0.0018 (3) | −0.0008 (3) |
C1 | 0.0363 (16) | 0.0348 (17) | 0.0308 (15) | 0.0102 (13) | 0.0090 (12) | 0.0112 (13) |
C2 | 0.0204 (13) | 0.0237 (14) | 0.0226 (13) | −0.0014 (10) | −0.0004 (10) | 0.0048 (10) |
C3 | 0.0238 (13) | 0.0166 (13) | 0.0239 (13) | 0.0003 (10) | 0.0028 (10) | −0.0028 (10) |
C4 | 0.0368 (17) | 0.0264 (16) | 0.0526 (19) | −0.0028 (13) | 0.0048 (14) | −0.0181 (14) |
C5 | 0.0220 (13) | 0.0188 (13) | 0.0240 (13) | −0.0014 (10) | 0.0032 (10) | −0.0006 (10) |
C6 | 0.0268 (15) | 0.0261 (15) | 0.0279 (14) | −0.0022 (11) | −0.0013 (11) | −0.0015 (11) |
C7 | 0.0353 (15) | 0.0160 (13) | 0.0245 (14) | −0.0001 (11) | 0.0018 (11) | −0.0036 (10) |
C8 | 0.0314 (16) | 0.0176 (14) | 0.0533 (19) | 0.0005 (11) | 0.0024 (14) | −0.0028 (13) |
N1 | 0.0238 (11) | 0.0189 (11) | 0.0204 (11) | −0.0009 (9) | 0.0024 (9) | −0.0018 (8) |
N2 | 0.0233 (11) | 0.0194 (11) | 0.0265 (11) | −0.0018 (9) | 0.0059 (9) | −0.0022 (9) |
O2 | 0.0224 (10) | 0.0265 (10) | 0.0264 (10) | 0.0019 (8) | 0.0089 (8) | −0.0021 (8) |
O3 | 0.0257 (10) | 0.0273 (11) | 0.0241 (9) | 0.0011 (8) | −0.0006 (8) | −0.0131 (8) |
O4 | 0.0299 (10) | 0.0184 (9) | 0.0216 (9) | 0.0015 (8) | −0.0069 (8) | 0.0001 (7) |
O5 | 0.0279 (10) | 0.0307 (11) | 0.0182 (9) | −0.0086 (8) | −0.0007 (7) | 0.0056 (7) |
O6 | 0.0364 (11) | 0.0165 (9) | 0.0243 (9) | −0.0111 (8) | 0.0055 (8) | −0.0005 (7) |
O7 | 0.0240 (9) | 0.0152 (9) | 0.0320 (10) | 0.0037 (7) | −0.0057 (8) | 0.0033 (7) |
O8 | 0.0270 (10) | 0.0154 (9) | 0.0292 (10) | −0.0076 (7) | 0.0021 (8) | −0.0041 (7) |
O9 | 0.0253 (10) | 0.0245 (10) | 0.0241 (9) | 0.0102 (8) | 0.0011 (7) | −0.0008 (7) |
P1 | 0.0174 (3) | 0.0172 (3) | 0.0146 (3) | −0.0003 (2) | 0.0020 (2) | −0.0026 (2) |
P2 | 0.0178 (3) | 0.0106 (3) | 0.0220 (3) | 0.0003 (2) | 0.0008 (2) | 0.0001 (2) |
Al1—O2 | 1.7215 (18) | C7—C8 | 1.505 (4) |
Al1—O9 | 1.7251 (17) | C7—H7A | 0.9700 |
Al1—O4i | 1.7300 (17) | C7—H7B | 0.9700 |
Al1—O6ii | 1.7326 (18) | C8—H8B | 0.9700 |
C1—C3 | 1.540 (3) | C8—H8A | 0.9700 |
C1—H1D | 0.9600 | N1—H1A | 0.8900 |
C1—H1E | 0.9600 | N1—H1B | 0.8900 |
C1—H1F | 0.9600 | N1—H1C | 0.8900 |
C2—N1 | 1.491 (3) | N2—H2A | 0.8900 |
C2—C3 | 1.530 (3) | N2—H2B | 0.8900 |
C2—C8 | 1.538 (4) | N2—H2C | 0.8900 |
C2—H2 | 0.9800 | O2—P1 | 1.5315 (17) |
C3—C4 | 1.529 (3) | O3—P1 | 1.4908 (17) |
C3—C5 | 1.557 (3) | O4—P1 | 1.5329 (16) |
C4—H4A | 0.9600 | O4—Al1i | 1.7300 (17) |
C4—H4B | 0.9600 | O5—P1 | 1.5519 (18) |
C4—H4C | 0.9600 | O5—H5B | 0.9600 |
C5—N2 | 1.509 (3) | O6—P2 | 1.5458 (17) |
C5—C6 | 1.529 (3) | O6—Al1ii | 1.7326 (18) |
C5—C7 | 1.539 (3) | O7—P2 | 1.5359 (16) |
C6—H6A | 0.9600 | O8—P2 | 1.4986 (17) |
C6—H6B | 0.9600 | O9—P2 | 1.5446 (17) |
C6—H6C | 0.9600 | ||
O2—Al1—O9 | 108.34 (9) | C8—C7—C5 | 105.8 (2) |
O2—Al1—O4i | 110.23 (9) | C8—C7—H7A | 110.6 |
O9—Al1—O4i | 109.95 (9) | C5—C7—H7A | 110.6 |
O2—Al1—O6ii | 110.69 (9) | C8—C7—H7B | 110.6 |
O9—Al1—O6ii | 109.18 (9) | C5—C7—H7B | 110.6 |
O4i—Al1—O6ii | 108.44 (9) | H7A—C7—H7B | 108.7 |
C3—C1—H1D | 109.5 | C7—C8—C2 | 105.8 (2) |
C3—C1—H1E | 109.5 | C7—C8—H8B | 110.6 |
H1D—C1—H1E | 109.5 | C2—C8—H8B | 110.6 |
C3—C1—H1F | 109.5 | C7—C8—H8A | 110.6 |
H1D—C1—H1F | 109.5 | C2—C8—H8A | 110.6 |
H1E—C1—H1F | 109.5 | H8B—C8—H8A | 108.7 |
N1—C2—C3 | 116.6 (2) | C2—N1—H1A | 109.5 |
N1—C2—C8 | 110.1 (2) | C2—N1—H1B | 109.5 |
C3—C2—C8 | 105.3 (2) | H1A—N1—H1B | 109.5 |
N1—C2—H2 | 108.2 | C2—N1—H1C | 109.5 |
C3—C2—H2 | 108.2 | H1A—N1—H1C | 109.5 |
C8—C2—H2 | 108.2 | H1B—N1—H1C | 109.5 |
C4—C3—C2 | 112.2 (2) | C5—N2—H2A | 109.5 |
C4—C3—C1 | 108.9 (2) | C5—N2—H2B | 109.5 |
C2—C3—C1 | 110.7 (2) | H2A—N2—H2B | 109.5 |
C4—C3—C5 | 114.2 (2) | C5—N2—H2C | 109.5 |
C2—C3—C5 | 98.78 (19) | H2A—N2—H2C | 109.5 |
C1—C3—C5 | 111.8 (2) | H2B—N2—H2C | 109.5 |
C3—C4—H4A | 109.5 | P1—O2—Al1 | 152.61 (12) |
C3—C4—H4B | 109.5 | P1—O4—Al1i | 148.27 (12) |
H4A—C4—H4B | 109.5 | P1—O5—H5B | 109.2 |
C3—C4—H4C | 109.5 | P2—O6—Al1ii | 140.61 (11) |
H4A—C4—H4C | 109.5 | P2—O9—Al1 | 140.31 (11) |
H4B—C4—H4C | 109.5 | O3—P1—O2 | 112.02 (10) |
N2—C5—C6 | 106.61 (19) | O3—P1—O4 | 109.53 (10) |
N2—C5—C7 | 107.00 (19) | O2—P1—O4 | 109.11 (10) |
C6—C5—C7 | 112.0 (2) | O3—P1—O5 | 110.98 (10) |
N2—C5—C3 | 113.7 (2) | O2—P1—O5 | 106.98 (10) |
C6—C5—C3 | 112.7 (2) | O4—P1—O5 | 108.10 (9) |
C7—C5—C3 | 104.73 (19) | O8—P2—O7 | 113.33 (10) |
C5—C6—H6A | 109.5 | O8—P2—O9 | 111.06 (10) |
C5—C6—H6B | 109.5 | O7—P2—O9 | 107.29 (9) |
H6A—C6—H6B | 109.5 | O8—P2—O6 | 108.91 (10) |
C5—C6—H6C | 109.5 | O7—P2—O6 | 108.08 (10) |
H6A—C6—H6C | 109.5 | O9—P2—O6 | 108.00 (10) |
H6B—C6—H6C | 109.5 |
Symmetry codes: (i) −x+1, −y+1, −z+2; (ii) −x, −y+1, −z+2. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···O3 | 0.89 | 1.87 | 2.751 (2) | 168 |
N1—H1B···O5iii | 0.89 | 2.06 | 2.910 (3) | 158 |
N1—H1C···O8iv | 0.89 | 1.85 | 2.709 (3) | 162 |
N2—H2A···O3v | 0.89 | 2.00 | 2.858 (2) | 160 |
N2—H2B···O8ii | 0.89 | 2.14 | 3.010 (2) | 167 |
N2—H2C···O7vi | 0.89 | 1.89 | 2.766 (3) | 169 |
O5—H5B···O7vii | 0.96 | 1.59 | 2.498 (2) | 156 |
Symmetry codes: (ii) −x, −y+1, −z+2; (iii) −x+1, −y+1, −z+1; (iv) −x+1/2, y−1/2, −z+3/2; (v) x−1, y, z; (vi) −x−1/2, y−1/2, −z+3/2; (vii) x+1, y, z. |
Experimental details
Crystal data | |
Chemical formula | (C8H20N2)[Al(HPO4)(PO4)] |
Mr | 362.19 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 293 |
a, b, c (Å) | 8.0102 (10), 16.862 (2), 10.5164 (12) |
β (°) | 93.203 (2) |
V (Å3) | 1418.2 (3) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.41 |
Crystal size (mm) | 0.22 × 0.19 × 0.18 |
Data collection | |
Diffractometer | Bruker APEX CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2001) |
Tmin, Tmax | 0.915, 0.930 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8701, 3386, 2442 |
Rint | 0.078 |
(sin θ/λ)max (Å−1) | 0.664 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.041, 0.098, 1.02 |
No. of reflections | 3386 |
No. of parameters | 195 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.47, −0.47 |
Computer programs: SMART (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), DIAMOND (Brandenburg, 1999), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···O3 | 0.89 | 1.87 | 2.751 (2) | 168 |
N1—H1B···O5i | 0.89 | 2.06 | 2.910 (3) | 158 |
N1—H1C···O8ii | 0.89 | 1.85 | 2.709 (3) | 162 |
N2—H2A···O3iii | 0.89 | 2.00 | 2.858 (2) | 160 |
N2—H2B···O8iv | 0.89 | 2.14 | 3.010 (2) | 167 |
N2—H2C···O7v | 0.89 | 1.89 | 2.766 (3) | 169 |
O5—H5B···O7vi | 0.96 | 1.59 | 2.498 (2) | 156 |
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) −x+1/2, y−1/2, −z+3/2; (iii) x−1, y, z; (iv) −x, −y+1, −z+2; (v) −x−1/2, y−1/2, −z+3/2; (vi) x+1, y, z. |
Acknowledgements
The author thanks Bengbu Medical College for supporting this work.
References
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There are considerable interests in the synthesis of chiral inorganic framework materials for their potential applications in separation and catalysis (Viter & Nagornyi, 2009). Our interest is particularly focused on the synthesis of microporous aluminophosphate. We used organic camphoric amine as the template and hydrothermally synthesized the title compound (Fig. 1).
The structure consists of aluminophosphate chains of formula [Al(HPO4)(PO4)]n, running along the a axis, and doubly protonated camphoric amine cations (Fig. 2). The chain is constructed from AlO4 tetrahedra and PO4 tetrahedra. Each AlO4 tetrahedron shares four O atoms with adjacent PO4 tetrahedra, whereas each PO4 tetrahedron shares two O atoms with adjacent AlO4 tetrahedra, leaving the other two O atoms terminal. The structure denotes that AlPO-CSC (Corner-Sharing Chain) is one of the fundamental chains in the known aluminophosphate compounds (Jones et al., 1990; Oliver et al., 1998; Williams et al., 1997). The negative charge of the chain is compensated by protonated organic camphoric amine cations, which are connected to the chains through N—H···O hydrogen bonds (Table 1).