Abstract
An ab initio coupled Hartree–Fock study has been carried out on polymethineimine (PMI) oligomers with an increasing number of unit cells (up to N=20) to determine the effect of conformational differences, and of end-capping by a strong donor-acceptor pair, on the static electronic longitudinal polarizability (αL) and first hyperpolarizability (βL). For the unsubstituted polymer the differences in βL per unit cell among the four conformations examined—trans-transoı̈d (TT), cis-transoı̈d (CT), trans-cisoı̈d (TC) and helical (HEL)—are large. βL/N is positive for the CT polymer, in contrast with the other conformers and with μL/N, which is negative in all cases. The TC polymer has the largest |βL|/N despite having a relatively small αL/N. Substitution of a strong acceptor (NO2) at the carbon end of an oligomer and a strong donor (NH2) at the nitrogen end results in a large increase of βL/N for small/medium N. In the case of the TT and, particularly, the CT conformer this leads to a maximum in |βL|/N vs N at N=4–6, which is substantially greater in magnitude than the one at N=∞. The latter is unaffected by substitution. We compare the [βL(N)/N]max obtained at intermediate N for substituted PMI chains with those calculated for linear polyenes and other π-conjugated oligomers. The shape of all the βL/N vs N curves obtained is fit to a function which yields parameters characterizing the delocalization along the backbone, the unit cell asymmetry, and the asymmetry of the chain ends.
References
77
Referenced
57
{'key': '2024020522145386900_r1'}
{'key': '2024020522145386900_r2'}
{'key': '2024020522145386900_r3'}
{'key': '2024020522145386900_r4'}
{'key': '2024020522145386900_r5'}
{'key': '2024020522145386900_r6'}
10.1021/cr00025a007
/ Chem. Rev. (1994)10.1103/PhysRevA.20.1179
/ Phys. Rev. A (1979){'key': '2024020522145386900_r9', 'first-page': '1351', 'year': '1987', 'journal-title': 'J. Chem. Soc. Perkin Trans. 2'}
/ J. Chem. Soc. Perkin Trans. 2 (1987)10.1021/j100379a018
/ J. Phys. Chem. (1990)10.1021/j100204a033
/ J. Phys. Chem. (1992)10.1002/qua.560420531
/ Int. J. Quantum Chem. (1992)10.1021/ja00034a024
/ J. Am. Chem. Soc. (1992)10.1002/qua.560460103
/ Int. J. Quantum Chem. (1993)10.1021/ja00067a039
/ J. Am. Chem. Soc. (1993)10.1021/ja00102a040
/ J. Am. Chem. Soc. (1994)10.1021/j100020a027
/ J. Phys. Chem. (1995){'key': '2024020522145386900_r18', 'first-page': '49', 'volume': '357', 'year': '1996', 'journal-title': 'J. Mol. Struct.'}
/ J. Mol. Struct. (1996)10.1016/0166-1280(95)04396-9
/ J. Mol. Struct. (1996)10.1021/jp950027i
/ J. Phys. Chem. (1996)10.1021/ja952690q
/ J. Am. Chem. Soc. (1996)10.1039/ft9949002617
/ J. Chem. Soc. Faraday Trans. (1994)10.1021/j100025a017
/ J. Phys. Chem. (1995)10.1063/1.471547
/ J. Chem. Phys. (1996)10.1063/1.469003
/ J. Chem. Phys. (1995)10.1063/1.469262
/ J. Chem. Phys. (1995)10.1016/0301-0104(95)00153-F
/ Chem. Phys. (1995){'key': '2024020522145386900_r28', 'first-page': '3841', 'volume': '50', 'year': '1994', 'journal-title': 'Phys. Rev. A'}
/ Phys. Rev. A (1994)10.1063/1.466555
/ J. Chem. Phys. (1994){'key': '2024020522145386900_r30', 'first-page': '667', 'volume': 'S27', 'year': '1993', 'journal-title': 'Int. J. Quantum Chem.'}
/ Int. J. Quantum Chem. (1993){'key': '2024020522145386900_r31', 'first-page': '8819', 'volume': '18', 'year': '1993', 'journal-title': 'J. Chem. Phys.'}
/ J. Chem. Phys. (1993)10.1002/qua.560430113
/ Int. J. Quantum Chem. (1992)10.1063/1.455480
/ J. Chem. Phys. (1988)10.1016/0009-2614(88)87015-5
/ Chem. Phys. Lett. (1988)10.1117/12.222820
/ Proc. SPIE (1995)10.1016/S0301-0104(96)00262-5
/ Chem. Phys. (1996)10.1016/S0379-6779(96)03704-6
/ Synth. Metals (1996)10.1021/jp962751m
/ J. Phys. Chem. A (1997){'key': '2024020522145386900_r39'}
{'key': '2024020522145386900_r40', 'first-page': '1969', 'volume': '22', 'year': '1971', 'journal-title': 'Tetrahedron Lett.'}
/ Tetrahedron Lett. (1971)10.1002/macp.1974.021750605
/ Makromol. Chem. (1974){'key': '2024020522145386900_r42', 'first-page': '3751', 'volume': '41–43', 'year': '1991', 'journal-title': 'Synth. Metals'}
/ Synth. Metals (1991)10.1016/0009-2614(91)90157-5
/ Chem. Phys. Lett. (1991)10.1016/0009-2614(79)80517-5
/ Chem. Phys. Lett. (1979)10.1016/0009-2614(80)85051-2
/ Chem. Phys. Lett. (1980)10.1063/1.448102
/ J. Chem. Phys. (1984)10.1098/rspa.1979.0037
/ Proc. R. Soc. London Ser. A (1979)10.1063/1.444576
/ J. Chem. Phys. (1983)10.1021/j100181a031
/ J. Phys. Chem. (1992)10.1016/0038-1098(86)90750-7
/ Solid State Commun. (1986){'key': '2024020522145386900_r51'}
10.1002/bbpc.19910951014
/ Ber. Bunsenges. Phys. Chem. (1991)10.1515/zna-1993-1-235
/ Z. Naturfosch. A (1993){'key': '2024020522145386900_r54', 'first-page': '1573', 'volume': '38', 'year': '1988', 'journal-title': 'Phys. Rev. B'}
/ Phys. Rev. B (1988){'key': '2024020522145386900_r55', 'first-page': '3961', 'volume': '55–57', 'year': '1993', 'journal-title': 'Synth. Metals'}
/ Synth. Metals (1993)10.1016/0009-2614(92)85211-R
/ Chem. Phys. Lett. (1992){'key': '2024020522145386900_r57'}
10.1063/1.460917
/ J. Chem. Phys. (1991)10.1063/1.463806
/ J. Chem. Phys. (1992)10.1063/1.462483
/ J. Chem. Phys. (1992)10.1063/1.471540
/ J. Chem. Phys. (1996){'key': '2024020522145386900_r62', 'first-page': '2463', 'volume': '106', 'year': '1997', 'journal-title': 'J. Chem. Phys.'}
/ J. Chem. Phys. (1997){'key': '2024020522145386900_r63'}
10.1016/0009-2614(84)85607-9
/ Chem. Phys. Lett. (1984)10.1063/1.1674902
/ J. Chem. Phys. (1971){'key': '2024020522145386900_r66', 'first-page': '236', 'volume': '1775', 'year': '1992', 'journal-title': 'Proc. SPIE'}
/ Proc. SPIE (1992)10.1063/1.460856
/ J. Chem. Phys. (1991){'key': '2024020522145386900_r68'}
{'key': '2024020522145386900_r69'}
10.1021/j100108a010
/ J. Phys. Chem. (1993)10.1016/0301-0104(95)00222-A
/ Chem. Phys. (1995)10.1103/PhysRevA.52.178
/ Phys. Rev. A (1995)10.1103/PhysRevA.52.1039
/ Phys. Rev. A (1995)10.1063/1.472536
/ J. Chem. Phys. (1996)10.1016/0009-2614(95)00907-L
/ Chem. Phys. Lett. (1995)10.1002/qua.560420434
/ Int. J. Quantum Chem. (1992)10.1002/(SICI)1097-461X(1996)57:5<811::AID-QUA1>3.0.CO;2-0
/ Int. J. Quantum Chem. (1996)
Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 8:25 a.m.) |
Deposited | 1 year, 7 months ago (Feb. 5, 2024, 6:21 p.m.) |
Indexed | 1 year, 6 months ago (Feb. 10, 2024, 4:03 p.m.) |
Issued | 27 years, 11 months ago (Oct. 1, 1997) |
Published | 27 years, 11 months ago (Oct. 1, 1997) |
Published Print | 27 years, 11 months ago (Oct. 1, 1997) |
@article{Jacquemin_1997, title={Ab initio static polarizability and first hyperpolarizability of model polymethineimine chains. II. Effects of conformation and of substitution by donor/acceptor end groups}, volume={107}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.474892}, DOI={10.1063/1.474892}, number={13}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Jacquemin, Denis and Champagne, Benoı̂t and Kirtman, Bernard}, year={1997}, month=oct, pages={5076–5087} }