Copper(II) complexes of salicylaldehydes and 2 hydroxyphenones: Synthesis, Structure,
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- Ευθύμιος Μανωλάς
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1 Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2015 Copper(II) complexes of salicylaldehydes and 2 hydroxyphenones: Synthesis, Structure, Thermal decomposition study and Interaction with calf thymus DNA and albumins Ariadne Zianna, George Psomas, Antonios G. Hatzidimitriou, Maria Lalia Kantouri * Department of General and Inorganic Chemistry, Faculty of Chemistry, Aristotle University of Thessaloniki, GR Thessaloniki, Greece Supplementary material S1. Interaction with CT DNA The binding constant, K b, can be obtained by monitoring the changes in the absorbance at the corresponding λ max with increasing concentrations of CT DNA and it is given by the ratio of [DNA] slope to the y intercept in plots versus [DNA], according to the Wolfe Shimer equation ( A f ) [1]: [DNA] [DNA] 1 (eq. S1) (ε ε ) (ε ε ) K (ε ε ) A f b f b where [DNA] is the concentration of DNA in base pairs, ε A = A obsd /[compound], ε f = the extinction coefficient for the free compound and ε b = the extinction coefficient for the compound in the fully bound form. b f S2. Competitive studies with EB The Stern Volmer constant K SV is used to evaluate the quenching efficiency for each compound according to the Stern Volmer equation: Io 1 KSV[Q] (eq. S2) I where Io and I are the emission intensities in the absence and the presence of the quencher, respectively, [Q] is the concentration of the quencher (i.e. complexes 1 6); K SV is obtained from the Io Stern Volmer plots by the slope of the diagram vs [Q]. I * Corresponding author: Tel./fax: , E mail address: lalia@chem.auth.gr (M. Lalia Kantouri)
2 S3. Interaction with serum albumins The extent of the inner filter effect can be roughly estimated with the following formula: I corr meas ( exc )cd 2 ( em )cd 2 I (eq. S3) where I corr = corrected intensity, I meas = the measured intensity, c = the concentration of the quencher, d = the cuvette (1 cm), ε(λ exc ) and ε(λ em ) = the ε of the quencher at the excitation and the emission wavelength, respectively, as calculated from the UV Vis spectra of the complexes [2]. The Stern Volmer and Scatchard graphs are used in order to study the interaction of a quencher with serum albumins. According to Stern Volmer quenching equation [3]: Io =1+ kq τ0[q] =1+ KSV[Q] (eq. S4), I where Io = the initial tryptophan fluorescence intensity of SA, I = the tryptophan fluorescence intensity of SA after the addition of the quencher, k q = the quenching rate constants of SA, K SV = the dynamic quenching constant, τ o = the average lifetime of SA without the quencher, [Q] = the concentration of the quencher, the dynamic quenching constant (K SV, M 1 ) can be obtained by the Io slope of the diagram vs [Q]. From the equation: I K SV = k q τ o (eq. S5) and taking τ o = 10 8 s as fluorescence lifetime of tryptophan in SA, the approximate quenching constant (k q, M 1 s 1 ) is calculated. From the Scatchard equation [3]: I Io nk K [Q] ΔI Io (eq. S6) where n is the number of binding sites per albumin and K is the association binding constant, K (in I M 1 ) is calculated from the slope in plots Io [Q] to the slope [3]. ΔI versus and n is given by the ratio of y intercept Io References [1] A. Wolfe, G. Shimer and T. Meehan, Biochemistry, 1987, 26, [2] L. Stella, A.L. Capodilupo and M. Bietti, Chem. Commun., 2008, [3] Y. Wang, H. Zhang, G. Zhang, W. Tao and S. Tang, J. Luminescence, 2007, 126,
3 Table S1. The HSA constants derived for the free saloh and ketoh and their complexes 1 7. Compound Ksv (M 1 ) Kq (M 1 s 1 ) K (M 1 ) n o vanh 2.52(±0.23) (±0.23) (±0.17) Me saloh 0(±0.15) (±0.15) (±0.12) NO 2 saloh 5.00(±0.46) (±0.46) (±0.09) Cl saloh 5.64(±0.40) (±0.40) (±0.10) Br saloh 2.31(±0.32) (±0.32) (±0.09) bpoh 3.05(±0.19) (±0.19) (±0.12) mpoh 7.67(±0.46) (±0.46) (±0.41) [Cu(o van) 2 H 2 O)]. 0.25H 2 O H 2 O 9(±0.25) (±0.25) (±0.22) [Cu(5 CH 3 salo) 2 ], (±0.54) (±0.54) (±0.48) [Cu(5 NO 2 salo) 2 (CH 3 OH) 2 ], (±0.27) (±0.27) (±0.11) [Cu(5 Cl salo) 2 ], (±0.60) (±0.60) (±0.43) [Cu(5 Br salo) 2 ], (±0.07) (±0.07) (±0.36) [Cu(bpo) 2 ], (±0.64) (±0.64) (±0.12) [Cu(mpo) 2 ]. 2H 2 O, 7. 2H 2 O 3.79(±0.18) (±0.18) (±0.68)
4 Table S2. The BSA constants derived for the free saloh and ketoh and their complexes 1 7. Compound K SV (M 1 ) k q (M 1 s 1 ) K (M 1 ) n o vanh 2.37(±0.13) (±0.13) (±0.10) Me saloh 6.15(±0.58) (±0.58) (±0.27) NO 2 saloh 6.55(±0.17) (±0.17) (±0.07) Cl saloh 6(±0.06) (±0.06) (±0.20) Br saloh 4.63(±0.31) (±0.31) (±0.08) bpoh 9.43(±0.36) (±0.36) (±0.23) mpoh 7.41(±0.46) (±0.46) (±0.17) [Cu(o van) 2 H 2 O)]. 0.25H 2 O, H 2 O 3.33(±0.23) (±0.23) (±0.98) [Cu(5 CH 3 salo) 2 ], (±0.51) (±0.51) (±0.13) [Cu(5 NO 2 salo) 2 (CH 3 OH) 2 ], (±0.43) (±0.43) (±0.20) [Cu(5 Cl salo) 2 ], 4 2(±0.09) (±0.09) (±0.81) [Cu(5 Br salo) 2 ], (±0.29) (±0.29) (±0.06) [Cu(bpo) 2 ], (±0.35) (±0.35) (±0.10) [Cu(mpo) 2 ]. 2H 2 O, 7. 2H 2 O 2.88(±0.14) (±0.14) (±0.23)
5 A A A A (A) , 0d 4, 1d 4, 2d , 0d 4, 1d 4, 2d (nm) (nm) (C) , 0d 6, 1d 6, 2d (D) , 0d 6, 1d 6, 2d (nm) (nm) Figure S1. UV spectra of a DMSO solution of complexes (A) 4 (10 3 M), 4 ( M), (C) 6 (10 3 M) and (D) 6 ( M) during time (0 h, 24 h and 48 h).
6 A A A (A) Complex 2 Complex 2 : buffer = 1:2 Complex 2 : buffer = 1: (nm) Complex 6 Complex 6 : buffer = 1:2 Complex 6 : buffer = 1: (nm) (C) Complex 7 Complex 7 : buffer = 1:2 Complex 7 : buffer = 1: (nm) Figure S2. Visible spectra of 10-3 M DMSO solution of complex (A) 2, 6 and (C) 7 upon addition of buffer solution (150 mm NaCl and 15 mm trisodium citrate at ph 7.0) at diverse ratios.
7 Figure S3. PXRD of complex 5.
8 {[DNA]/( A - f )}x10 7, (M 2 cm) {[DNA]/( A - f )}x10 8, (M 2 cm) {[DNA]/( A - f )}x10 8, (M 2 cm) (A) [DNA]x10 5, (M) [DNA]x10 5, (M) (C) Figure S4. Plot of [DNA]x10 5, (M) [DNA] vs [DNA] for (A) o vanh, 5 Me saloh and (C) mpoh. (ε ε ) A f
9 {[DNA]/( A - f )}x10 8, (M 2 cm) {[DNA]/( A - f )}x10 8, (M 2 cm) {[DNA]/( A - f )}x10 8, (M 2 cm) {[DNA]/( A - f )}x10 8, (M 2 cm) {[DNA]/( A - f )}x10 8, (M 2 cm) {[DNA]/( A - f )}x10 8, (M 2 cm) {[DNA]/( A - f )}x10 8, (M 2 cm) (A) [DNA]x10 5, (M) [DNA]x10 5, (M) (C) -0.5 (D) [DNA]x10 5, (M) [DNA]x10 5, (M) (E) (F) [DNA]x10 5, (M) [DNA]x10 5, (M) (G) [DNA]x10 5, (M) Figure S5. (A) (G) Plot of [DNA] vs [DNA] for complexes 1 7, respectively. (ε ε ) A f
10 I ( A) DNA V (mv) Figure S6. Cyclic voltammogram of 0.4 mm 1/2 dmso/buffer (containing 150 mm NaCl and 15 mm trisodium citrate at ph 7.0) solution of [Cu(5 Me salo) 2 ], 2 in the absence or presence of CT DNA. Scan rate = 100 mv s 1. Supporting electrolyte = buffer solution.
11 I/Io (A) [o-vanh]x10 5, (M) [5-Me-saloH]x10 5, (M) (C) [mpoh]x10 5, (M) Figure S7. Stern Volmer quenching plot of EB bound to CT DNA for (A) o vanh, 5 Me saloh and (C) mpoh.
12 (A) [1]x10 5, (M) [2]x10 5, (M) 4.0 (C) [3]x10 5, (M) (D) [4]x10 5, (M) (E) (F) [5]x10 5, (M) [6]x10 5, (M) (G) [7]x10 5, (M) Figure S8. (A) (G) Stern Volmer quenching plot of EB bound to CT DNA for complexes 1 7, respectively.
13 (A) [o-vanh]x10 5, (M) [5-Me-saloH]x10 5, (M) (C) 2.5 (D) [5-NO 2 -saloh]x10 5, (M) [5-Cl-saloH]x10 5, (M) (E) (F) [5-Br-saloH]x10 5, (M) [bpoh]x10 5, (M) (G) [mpoh]x10 5, (M) Figure S9. Stern Volmer quenching plot of BSA for (A) o vanh, 5 Me saloh, (C) 5 NO 2 saloh, (D) 5 Cl saloh, (E) 5 Br saloh, (F) bpoh and (G) mpoh.
14 (A) [1]x10 5, (M) [2]x10 5, (M) (C) [3]x10 5, (M) (D) [4]x10 5, (M) 2.4 (E) (F) [5]x10 5, (M) [6]x10 5, (M) (G) [7]x10 5, (M) Figure S10. (A) (G) Stern Volmer quenching plot of BSA for complexes 1 7, respectively.
15 (A) [o-vanh]x10 5, (M) [5-Me-saloH]x10 5, (M) (C) (D) [5-NO 2 -saloh]x10 5, (M) [5-Cl-saloH]x10 5, (M) 1.30 (E) (F) [5-Br-saloH]x10 5, (M) [bpoh]x10 5, (M) 1.16 (G) [mpoh]x10 5, (M) Figure S11. Stern Volmer quenching plot of HSA for (A) o vanh, 5 Me saloh, (C) 5 NO 2 saloh, (D) 5 Cl saloh, (E) 5 Br saloh, (F) bpoh and (G) mpoh.
16 (A) [1]x10 5, (M) [2]x10 5, (M) (C) (D) [3]x10 5, (M) [4]x10 5, (M) (E) (F) [5]x10 5, (M) [6]x10 5, (M) (G) [7]x10 5, (M) Figure S12. (A) (G) Stern Volmer quenching plot of HSA for complexes 1 7, respectively.
17 /[mpoh] /[5-Br-saloH] /[bpoh] /[5-NO 2 -saloh] /[5-Cl-saloH] /[o-vanh] /[5-Me-saloH] (A) (C) (D) (E) (F) (G) Figure S13. Scatchard plot of BSA for (A) o vanh, 5 Me saloh, (C) 5 NO 2 saloh, (D) 5 Cl saloh, (E) 5 Br saloh, (F) bpoh and (G) mpoh.
18 /[7] /[5] /[6] /[3] /[4] /[1] /[2] (A) (C) (D) (E) (F) (G) Figure S14. (A) (G) Scatchard plot of BSA for complexes 1 7, respectively.
19 /[mpoh] /[5-Br-saloH] /[bpoh] /[5-NO 2 -saloh] /[5-Cl-saloH] /[o-vanh] /[5-Me-saloH] (A) (C) (D) (E) (F) (G) Figure S15. Scatchard plot of HSA for (A) o vanh, 5 Me saloh, (C) 5 NO 2 saloh, (D) 5 Cl saloh, (E) 5 Br saloh, (F) bpoh and (G) mpoh.
20 /[7] /[5] /[6] /[3] /[4] /[1] /[2] (A) (C) (D) (E) (F) (G) Figure S16. (A) (G) Scatchard plot of HSA for complexes 1 7, respectively.
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