A 4′-(4-carb­oxy­phen­yl)-3,2′:6′,3′′-terpyridine-based luminescent cadmium(II) coordination polymer for the detection of 2,4,6-tri­nitro­phenol

Xu, B.; Luo, F.; Tang, G.; Zhang, J.

doi:10.1107/S2053229619004248

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A 4′-(4-carboxyphenyl)-3,2′:6′,3′′-terpyridine-based luminescent cadmium(II) coordination polymer for the detection of 2,4,6-trinitrophenol

B. Xu, F. Luo, G. Tang and J. Zhang

The title coordination polymer, poly[bis[μ3-4-(3,2′:6′,3′′-terpyridin-4′-yl)benzoato]cadmium(II)], [Cd(C₂₂H₁₄N₃O₂)₂]_n or [Cd(3-cptpy)₂]_n, (I), has been synthesized solvothermally and characterized by IR spectroscopy, thermogravimetric analysis, and single-crystal and powder X-ray diffraction. The structure is composed of 3-cptpy⁻ ligands bridging Cd atoms, with each Cd atom coordinated by six ligands and each ligand coordinating to three Cd atoms. Each Cd atom is in a slightly distorted trans-N₂O₄ octahedral environment, forming a two-dimensional layer structure with a (3,6)-connected topology. Layers are linked to each other by π–π stacking, resulting in a three-dimensional supramolecular framework. The strong luminescence and good thermal stability of (I) indicate that it can potentially be used as a luminescence sensor. The compound also shows a highly selective and sensitive response to 2,4,6-trinitrophenol through the luminescence quenching effect.

Keywords: cadmium(II); two-dimensional coordination polymer; crystal structure; luminescence; TNP sensor.

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Supporting information

	Crystallographic Information File (CIF) https://doi.org/10.1107/S2053229619004248/cu3138sup1.cif Contains datablock I
	Structure factor file (CIF format) https://doi.org/10.1107/S2053229619004248/cu3138Isup2.hkl Contains datablock I
	Portable Document Format (PDF) file https://doi.org/10.1107/S2053229619004248/cu3138sup3.pdf Supplementary figures S1-S7

CCDC reference: 1906400

Computing details top

Data collection: APEX2 (Bruker, 2012); cell refinement: APEX2 (Bruker, 2012); data reduction: APEX2 (Bruker, 2012); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2016 (Sheldrick, 2015); molecular graphics: SHELXL2016 (Sheldrick, 2015); software used to prepare material for publication: publCIF (Westrip, 2010).

Poly[bis[µ₃-4-(3,2':6',3''-terpyridin-4'-yl)benzoato]cadmium(II)] top

Crystal data top

[Cd(C₂₂H₁₄N₃O₂)₂]	Z = 1
M_r = 817.12	F(000) = 414
Triclinic, P1	D_x = 1.639 Mg m⁻³
a = 5.0100 (2) Å	Mo Kα radiation, λ = 0.71073 Å
b = 9.5930 (4) Å	Cell parameters from 8991 reflections
c = 17.3488 (8) Å	θ = 3.1–26.4°
α = 91.192 (2)°	µ = 0.72 mm⁻¹
β = 96.049 (2)°	T = 150 K
γ = 92.858 (2)°	PILL, colorless
V = 827.84 (6) Å³	0.20 × 0.15 × 0.10 mm

Data collection top

Bruker D8 VENTURE diffractometer	3329 reflections with I > 2σ(I)
ω scans	R_int = 0.020
Absorption correction: multi-scan (SADABS; Bruker, 2012)	θ_max = 26.4°, θ_min = 3.1°
T_min = 0.660, T_max = 0.745	h = −6→6
5557 measured reflections	k = −11→11
3379 independent reflections	l = −21→21

Refinement top

Refinement on F²	0 restraints
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F² > 2σ(F²)] = 0.023	H-atom parameters constrained
wR(F²) = 0.060	w = 1/[σ²(F_o²) + (0.0244P)² + 0.2706P] where P = (F_o² + 2F_c²)/3
S = 1.12	(Δ/σ)_max < 0.001
3379 reflections	Δρ_max = 0.56 e Å⁻³
335 parameters	Δρ_min = −0.81 e Å⁻³

Special details top

Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq	Occ. (<1)
Cd1	0.500000	0.000000	1.000000	0.01297 (7)
C1	1.0308 (3)	0.21232 (17)	0.96914 (9)	0.0136 (3)
O2	1.2054 (2)	0.17352 (14)	1.02003 (7)	0.0209 (3)
N2	2.3320 (3)	0.98504 (15)	0.86811 (8)	0.0153 (3)
C2	1.1168 (3)	0.32288 (17)	0.91458 (10)	0.0132 (3)
N3	1.6941 (3)	0.79443 (16)	0.66123 (8)	0.0163 (3)
C7	1.3176 (4)	0.51630 (19)	0.81297 (10)	0.0174 (3)
C8	1.4414 (3)	0.61444 (19)	0.76015 (10)	0.0173 (3)
C9	1.6566 (3)	0.70589 (19)	0.78812 (10)	0.0170 (3)
H9	1.718309	0.709015	0.840630	0.020*
C10	1.7787 (3)	0.79231 (18)	0.73735 (10)	0.0148 (3)
C11	1.4822 (3)	0.70966 (19)	0.63446 (10)	0.0168 (3)
C12	1.3528 (3)	0.61729 (19)	0.68101 (10)	0.0192 (4)
H12	1.209557	0.558388	0.659790	0.023*
C13	2.0141 (3)	0.88879 (17)	0.76415 (10)	0.0129 (3)
C14	2.1191 (3)	0.90117 (18)	0.84179 (10)	0.0154 (3)
H14	2.035985	0.847856	0.877505	0.018*
C15	2.1398 (4)	0.9695 (2)	0.71168 (10)	0.0242 (4)
H15	2.064183	0.977275	0.660752	0.029*
C3A	0.9619 (7)	0.3645 (4)	0.8521 (2)	0.0158 (8)	0.499 (3)
H3A	0.782249	0.333101	0.843929	0.019*	0.499 (3)
C4A	1.0682 (8)	0.4544 (4)	0.7994 (2)	0.0160 (8)	0.499 (3)
H4A	0.963827	0.472302	0.753466	0.019*	0.499 (3)
C5A	1.3856 (7)	0.3762 (4)	0.93061 (19)	0.0153 (8)	0.499 (3)
H5A	1.491225	0.349445	0.974614	0.018*	0.499 (3)
C6A	1.4893 (7)	0.4686 (4)	0.8798 (2)	0.0162 (8)	0.499 (3)
H6A	1.668591	0.500606	0.888215	0.019*	0.499 (3)
C3B	1.0847 (7)	0.2982 (4)	0.8326 (2)	0.0142 (7)	0.501 (3)
H3B	0.997962	0.215743	0.811842	0.017*	0.501 (3)
C4B	1.1833 (8)	0.3975 (4)	0.78363 (19)	0.0150 (7)	0.501 (3)
H4B	1.156407	0.381948	0.730220	0.018*	0.501 (3)
C5B	1.2208 (6)	0.4520 (4)	0.94186 (19)	0.0139 (7)	0.501 (3)
H5B	1.230328	0.472651	0.994723	0.017*	0.501 (3)
C6B	1.3123 (6)	0.5528 (3)	0.89306 (19)	0.0138 (7)	0.501 (3)
H6B	1.368693	0.641934	0.912107	0.017*	0.501 (3)
N1A	1.1884 (7)	0.6239 (4)	0.42824 (19)	0.0272 (8)	0.500 (3)
C18A	1.3875 (3)	0.72172 (19)	0.55086 (10)	0.0176 (3)	0.500 (3)
C19A	1.2790 (8)	0.6140 (4)	0.5036 (2)	0.0232 (8)	0.500 (3)
H19A	1.266320	0.526348	0.525207	0.028*	0.500 (3)
C20A	1.4116 (7)	0.8560 (4)	0.5169 (2)	0.0219 (8)	0.500 (3)
H20A	1.488323	0.933101	0.546027	0.026*	0.500 (3)
C21A	1.3171 (8)	0.8679 (4)	0.4393 (2)	0.0250 (9)	0.500 (3)
H21A	1.317850	0.954052	0.415694	0.030*	0.500 (3)
C22A	1.2189 (5)	0.7436 (3)	0.39717 (11)	0.0326 (5)	0.500 (3)
H22A	1.174002	0.749258	0.343968	0.039*	0.500 (3)
N1B	1.4920 (7)	0.7617 (4)	0.42099 (19)	0.0300 (8)	0.500 (3)
C18B	1.3875 (3)	0.72172 (19)	0.55086 (10)	0.0176 (3)	0.500 (3)
C19B	1.5638 (7)	0.7522 (4)	0.4972 (2)	0.0217 (8)	0.500 (3)
H19B	1.744861	0.767223	0.515047	0.026*	0.500 (3)
C20B	1.1147 (8)	0.6932 (5)	0.5237 (2)	0.0252 (9)	0.500 (3)
H20B	0.989380	0.669399	0.557744	0.030*	0.500 (3)
C21B	1.0381 (8)	0.7015 (5)	0.4448 (2)	0.0317 (10)	0.500 (3)
H21B	0.861629	0.677839	0.424875	0.038*	0.500 (3)
C22B	1.2189 (5)	0.7436 (3)	0.39717 (11)	0.0326 (5)	0.500 (3)
H22B	1.158523	0.761499	0.345963	0.039*	0.500 (3)
C16A	2.3879 (12)	1.0403 (6)	0.7390 (4)	0.0169 (9)	0.538 (6)
H16A	2.492199	1.082883	0.703969	0.020*	0.538 (6)
C17A	2.4762 (14)	1.0464 (7)	0.8175 (5)	0.0151 (10)	0.538 (6)
H17A	2.638292	1.094169	0.834805	0.018*	0.538 (6)
C16B	2.3185 (14)	1.0787 (7)	0.7379 (5)	0.0169 (9)	0.462 (6)
H16B	2.371949	1.147443	0.704885	0.020*	0.462 (6)
C17B	2.4140 (16)	1.0810 (9)	0.8156 (6)	0.0151 (10)	0.462 (6)
H17B	2.541193	1.151142	0.833782	0.018*	0.462 (6)
O1A	0.8147 (16)	0.1497 (8)	0.9547 (5)	0.0170 (9)	0.483 (9)
O1B	0.7699 (15)	0.1864 (7)	0.9647 (4)	0.0170 (9)	0.517 (9)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Cd1	0.01142 (9)	0.01436 (10)	0.01246 (10)	−0.00200 (6)	−0.00156 (6)	0.00505 (6)
C1	0.0174 (8)	0.0099 (8)	0.0126 (7)	−0.0019 (6)	−0.0004 (6)	−0.0001 (6)
O2	0.0210 (6)	0.0304 (7)	0.0123 (6)	0.0094 (5)	0.0011 (5)	0.0071 (5)
N2	0.0163 (7)	0.0148 (7)	0.0143 (7)	−0.0039 (5)	0.0013 (5)	−0.0019 (6)
C2	0.0118 (7)	0.0131 (8)	0.0143 (8)	−0.0002 (6)	0.0005 (6)	0.0017 (6)
N3	0.0159 (7)	0.0192 (7)	0.0127 (7)	−0.0037 (6)	−0.0017 (5)	0.0044 (6)
C7	0.0203 (8)	0.0178 (9)	0.0125 (8)	−0.0070 (7)	−0.0017 (6)	0.0026 (7)
C8	0.0184 (8)	0.0189 (9)	0.0133 (8)	−0.0057 (7)	−0.0019 (6)	0.0024 (7)
C9	0.0175 (8)	0.0194 (9)	0.0127 (8)	−0.0040 (7)	−0.0034 (6)	0.0038 (7)
C10	0.0135 (7)	0.0163 (8)	0.0134 (8)	−0.0012 (6)	−0.0036 (6)	0.0023 (6)
C11	0.0162 (8)	0.0212 (9)	0.0118 (8)	−0.0030 (6)	−0.0022 (6)	0.0014 (7)
C12	0.0176 (8)	0.0243 (9)	0.0136 (8)	−0.0088 (7)	−0.0034 (6)	0.0021 (7)
C13	0.0129 (7)	0.0115 (8)	0.0137 (8)	−0.0005 (6)	0.0002 (6)	0.0005 (6)
C14	0.0142 (7)	0.0161 (8)	0.0148 (8)	−0.0036 (6)	−0.0016 (6)	0.0037 (6)
C15	0.0310 (10)	0.0283 (10)	0.0118 (8)	−0.0139 (8)	0.0017 (7)	−0.0011 (7)
C3A	0.0121 (15)	0.0139 (17)	0.0205 (17)	−0.0034 (14)	−0.0014 (13)	0.0019 (14)
C4A	0.0169 (17)	0.0177 (18)	0.0124 (16)	0.0005 (15)	−0.0045 (14)	0.0048 (14)
C5A	0.0171 (16)	0.0151 (17)	0.0128 (15)	−0.0002 (13)	−0.0018 (12)	0.0020 (13)
C6A	0.0124 (15)	0.0183 (17)	0.0174 (16)	−0.0006 (12)	−0.0011 (12)	0.0033 (14)
C3B	0.0142 (15)	0.0108 (16)	0.0160 (16)	−0.0047 (13)	−0.0030 (13)	0.0001 (13)
C4B	0.0163 (16)	0.0188 (18)	0.0092 (15)	−0.0011 (15)	−0.0012 (13)	0.0013 (14)
C5B	0.0141 (15)	0.0161 (17)	0.0109 (15)	−0.0019 (12)	−0.0009 (12)	0.0023 (13)
C6B	0.0149 (15)	0.0107 (15)	0.0143 (16)	−0.0037 (12)	−0.0030 (12)	0.0011 (13)
N1A	0.0313 (18)	0.033 (2)	0.0146 (15)	−0.0125 (15)	−0.0065 (13)	0.0009 (14)
C18A	0.0181 (8)	0.0221 (9)	0.0116 (8)	−0.0024 (7)	−0.0022 (6)	0.0030 (7)
C19A	0.0249 (18)	0.025 (2)	0.0172 (17)	−0.0096 (15)	−0.0035 (14)	0.0055 (15)
C20A	0.0247 (18)	0.0242 (19)	0.0155 (17)	−0.0031 (14)	−0.0022 (14)	0.0017 (14)
C21A	0.031 (2)	0.026 (2)	0.0162 (18)	−0.0017 (15)	−0.0042 (15)	0.0078 (15)
C22A	0.0393 (11)	0.0435 (13)	0.0124 (9)	−0.0080 (10)	−0.0066 (8)	0.0068 (9)
N1B	0.0369 (19)	0.038 (2)	0.0136 (15)	−0.0095 (15)	0.0014 (14)	0.0066 (14)
C18B	0.0181 (8)	0.0221 (9)	0.0116 (8)	−0.0024 (7)	−0.0022 (6)	0.0030 (7)
C19B	0.0225 (17)	0.024 (2)	0.0169 (17)	−0.0061 (14)	−0.0014 (14)	0.0049 (15)
C20B	0.0204 (18)	0.040 (2)	0.0145 (17)	−0.0027 (16)	−0.0013 (14)	0.0012 (16)
C21B	0.0249 (19)	0.048 (3)	0.0193 (19)	−0.0013 (19)	−0.0092 (16)	0.0009 (18)
C22B	0.0393 (11)	0.0435 (13)	0.0124 (9)	−0.0080 (10)	−0.0066 (8)	0.0068 (9)
C16A	0.020 (3)	0.015 (3)	0.0161 (10)	−0.0036 (15)	0.0043 (18)	0.0019 (19)
C17A	0.011 (3)	0.017 (3)	0.0169 (10)	−0.0023 (17)	0.001 (2)	−0.002 (2)
C16B	0.020 (3)	0.015 (3)	0.0161 (10)	−0.0036 (15)	0.0043 (18)	0.0019 (19)
C17B	0.011 (3)	0.017 (3)	0.0169 (10)	−0.0023 (17)	0.001 (2)	−0.002 (2)
O1A	0.013 (2)	0.017 (3)	0.0204 (19)	−0.0044 (16)	−0.0011 (13)	0.0058 (19)
O1B	0.013 (2)	0.017 (3)	0.0204 (19)	−0.0044 (16)	−0.0011 (13)	0.0058 (19)

Geometric parameters (Å, º) top

Cd1—O1A	2.292 (9)	C15—H15	0.9300
Cd1—O1Aⁱ	2.292 (9)	C3A—C4A	1.398 (5)
Cd1—O1Bⁱ	2.320 (8)	C3A—H3A	0.9300
Cd1—O1B	2.320 (8)	C4A—H4A	0.9300
Cd1—O2ⁱⁱ	2.3236 (12)	C5A—C6A	1.384 (5)
Cd1—O2ⁱⁱⁱ	2.3236 (12)	C5A—H5A	0.9300
Cd1—N2^iv	2.3522 (14)	C6A—H6A	0.9300
Cd1—N2^v	2.3522 (14)	C3B—C4B	1.396 (5)
C1—O1A	1.211 (9)	C3B—H3B	0.9300
C1—O2	1.252 (2)	C4B—H4B	0.9300
C1—O1B	1.312 (8)	C5B—C6B	1.390 (4)
C1—C2	1.513 (2)	C5B—H5B	0.9300
N2—C17A	1.324 (8)	C6B—H6B	0.9300
N2—C14	1.338 (2)	N1A—C22A	1.288 (4)
N2—C17B	1.386 (10)	N1A—C19A	1.345 (5)
C2—C3A	1.344 (4)	C18A—C19A	1.360 (4)
C2—C5B	1.374 (4)	C18A—C20A	1.433 (4)
C2—C5A	1.414 (4)	C19A—H19A	0.9300
C2—C3B	1.427 (4)	C20A—C21A	1.388 (5)
N3—C11	1.341 (2)	C20A—H20A	0.9300
N3—C10	1.345 (2)	C21A—C22A	1.424 (5)
C7—C4A	1.352 (4)	C21A—H21A	0.9300
C7—C4B	1.356 (4)	C22A—H22A	0.9300
C7—C6B	1.429 (4)	N1B—C19B	1.340 (5)
C7—C6A	1.465 (4)	N1B—C22B	1.388 (4)
C7—C8	1.486 (2)	C18B—C19B	1.375 (4)
C8—C9	1.395 (2)	C18B—C20B	1.410 (4)
C8—C12	1.399 (2)	C19B—H19B	0.9300
C9—C10	1.389 (2)	C20B—C21B	1.387 (5)
C9—H9	0.9300	C20B—H20B	0.9300
C10—C13	1.490 (2)	C21B—C22B	1.342 (5)
C11—C12	1.393 (2)	C21B—H21B	0.9300
C11—C18B	1.486 (2)	C22B—H22B	0.9300
C11—C18A	1.486 (2)	C16A—C17A	1.387 (10)
C12—H12	0.9300	C16A—H16A	0.9300
C13—C15	1.388 (2)	C17A—H17A	0.9300
C13—C14	1.394 (2)	C16B—C17B	1.381 (13)
C14—H14	0.9300	C16B—H16B	0.9300
C15—C16B	1.381 (8)	C17B—H17B	0.9300
C15—C16A	1.417 (7)

O1A—Cd1—O1Aⁱ	180.0	C2—C3A—H3A	119.7
O1A—Cd1—O1Bⁱ	168.40 (16)	C4A—C3A—H3A	119.7
O1Aⁱ—Cd1—O1Bⁱ	11.60 (16)	C7—C4A—C3A	122.2 (3)
O1Bⁱ—Cd1—O1B	180.0 (4)	C7—C4A—H4A	118.9
O1A—Cd1—O2ⁱⁱ	94.29 (16)	C3A—C4A—H4A	118.9
O1Aⁱ—Cd1—O2ⁱⁱ	85.71 (17)	C6A—C5A—C2	119.0 (3)
O1A—Cd1—O2ⁱⁱⁱ	85.71 (16)	C6A—C5A—H5A	120.5
O1Aⁱ—Cd1—O2ⁱⁱⁱ	94.29 (17)	C2—C5A—H5A	120.5
O2ⁱⁱ—Cd1—O2ⁱⁱⁱ	180.0	C5A—C6A—C7	120.2 (3)
O1A—Cd1—N2^iv	82.4 (2)	C5A—C6A—H6A	119.9
O1Aⁱ—Cd1—N2^iv	97.6 (2)	C7—C6A—H6A	119.9
O2ⁱⁱ—Cd1—N2^iv	89.77 (5)	C4B—C3B—C2	120.1 (3)
O2ⁱⁱⁱ—Cd1—N2^iv	90.23 (5)	C4B—C3B—H3B	119.9
O1A—Cd1—N2^v	97.6 (2)	C2—C3B—H3B	119.9
O1Aⁱ—Cd1—N2^v	82.4 (2)	C7—C4B—C3B	120.8 (3)
O2ⁱⁱ—Cd1—N2^v	90.23 (5)	C7—C4B—H4B	119.6
O2ⁱⁱⁱ—Cd1—N2^v	89.77 (5)	C3B—C4B—H4B	119.6
N2^iv—Cd1—N2^v	180.0	C2—C5B—C6B	122.2 (3)
O1A—C1—O2	122.1 (4)	C2—C5B—H5B	118.9
O2—C1—O1B	127.5 (4)	C6B—C5B—H5B	118.9
O1A—C1—C2	119.3 (4)	C5B—C6B—C7	118.5 (3)
O2—C1—C2	117.40 (15)	C5B—C6B—H6B	120.7
O1B—C1—C2	114.0 (3)	C7—C6B—H6B	120.7
C1—O2—Cd1^vi	124.00 (11)	C22A—N1A—C19A	117.4 (3)
C17A—N2—C14	118.9 (4)	C19A—C18A—C20A	117.1 (3)
C14—N2—C17B	115.1 (4)	C19A—C18A—C11	124.8 (2)
C17A—N2—Cd1^vii	118.1 (4)	C20A—C18A—C11	118.2 (2)
C14—N2—Cd1^vii	122.24 (11)	N1A—C19A—C18A	125.4 (3)
C3A—C2—C5A	120.5 (2)	N1A—C19A—H19A	117.3
C5B—C2—C3B	117.6 (2)	C18A—C19A—H19A	117.3
C3A—C2—C1	124.4 (2)	C21A—C20A—C18A	118.1 (3)
C5B—C2—C1	121.30 (19)	C21A—C20A—H20A	120.9
C5A—C2—C1	114.96 (19)	C18A—C20A—H20A	120.9
C3B—C2—C1	121.05 (19)	C20A—C21A—C22A	117.7 (3)
C11—N3—C10	117.76 (14)	C20A—C21A—H21A	121.2
C4B—C7—C6B	119.2 (2)	C22A—C21A—H21A	121.2
C4A—C7—C6A	116.8 (2)	N1A—C22A—C21A	124.0 (3)
C4A—C7—C8	125.0 (2)	N1A—C22A—H22A	118.0
C4B—C7—C8	119.8 (2)	C21A—C22A—H22A	118.0
C6B—C7—C8	120.70 (19)	C19B—N1B—C22B	116.0 (3)
C6A—C7—C8	117.67 (19)	C19B—C18B—C20B	118.0 (2)
C9—C8—C12	117.45 (15)	C19B—C18B—C11	121.4 (2)
C9—C8—C7	120.49 (15)	C20B—C18B—C11	120.5 (2)
C12—C8—C7	122.04 (16)	N1B—C19B—C18B	124.3 (3)
C10—C9—C8	119.85 (16)	N1B—C19B—H19B	117.8
C10—C9—H9	120.1	C18B—C19B—H19B	117.8
C8—C9—H9	120.1	C21B—C20B—C18B	118.2 (3)
N3—C10—C9	122.61 (16)	C21B—C20B—H20B	120.9
N3—C10—C13	115.61 (15)	C18B—C20B—H20B	120.9
C9—C10—C13	121.77 (15)	C22B—C21B—C20B	120.0 (3)
N3—C11—C12	123.25 (16)	C22B—C21B—H21B	120.0
N3—C11—C18B	115.60 (15)	C20B—C21B—H21B	120.0
C12—C11—C18B	121.14 (16)	C21B—C22B—N1B	122.9 (3)
N3—C11—C18A	115.60 (15)	C21B—C22B—H22B	118.6
C12—C11—C18A	121.14 (16)	N1B—C22B—H22B	118.6
C11—C12—C8	119.03 (16)	C17A—C16A—C15	120.5 (5)
C11—C12—H12	120.5	C17A—C16A—H16A	119.8
C8—C12—H12	120.5	C15—C16A—H16A	119.8
C15—C13—C14	117.22 (16)	N2—C17A—C16A	120.6 (6)
C15—C13—C10	120.64 (15)	N2—C17A—H17A	119.7
C14—C13—C10	122.14 (15)	C16A—C17A—H17A	119.7
N2—C14—C13	124.04 (15)	C15—C16B—C17B	116.8 (7)
N2—C14—H14	118.0	C15—C16B—H16B	121.6
C13—C14—H14	118.0	C17B—C16B—H16B	121.6
C16B—C15—C13	120.1 (4)	C16B—C17B—N2	124.1 (8)
C13—C15—C16A	117.3 (3)	C16B—C17B—H17B	118.0
C16B—C15—H15	114.2	N2—C17B—H17B	118.0
C13—C15—H15	121.4	C1—O1A—Cd1	145.8 (6)
C16A—C15—H15	121.3	C1—O1B—Cd1	133.7 (4)
C2—C3A—C4A	120.6 (3)

Symmetry codes: (i) −x+1, −y, −z+2; (ii) x−1, y, z; (iii) −x+2, −y, −z+2; (iv) x−2, y−1, z; (v) −x+3, −y+1, −z+2; (vi) x+1, y, z; (vii) x+2, y+1, z.

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
C21B—H21B···N1Bⁱⁱ	0.93	2.05	2.814 (6)	138
C14—H14···O2^v	0.93	2.26	3.111 (2)	152

Symmetry codes: (ii) x−1, y, z; (v) −x+3, −y+1, −z+2.

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A 4′-(4-carb­oxy­phen­yl)-3,2′:6′,3′′-terpyridine-based luminescent cadmium(II) coordination polymer for the detection of 2,4,6-tri­nitro­phenol

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A 4′-(4-carboxyphenyl)-3,2′:6′,3′′-terpyridine-based luminescent cadmium(II) coordination polymer for the detection of 2,4,6-trinitrophenol