Structure-function relationships of second hyperpolarizabilities in two-dimensional molecules

Conference · Sat Jul 01 04:00:00 EDT 1995

OSTI ID:82398

Chen, L X ^[1]; Mandal, B K; Bihari, B ^[2]

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1. Argonne National Lab., IL (United States)
2. Illinois Institute of Technology, Chicago, IL (United States). Dept. of Chemistry; and others

The enhancement of the third order susceptibilities X{sup (3)} and second order molecular hyperpolarizabilities <{gamma}> in a series of covalently stacked dimer and trimer macrocycles (SiPc and SiNc) was observed through the phase conjugated signals from DFWM measurements at both 1064 and 532 nm. The FWHM of the phase conjugated signals at 532 nm is much smaller than those at 1064 nm and those of the reference compound CS{sub 2}. The <{gamma}> values at both wavelengths as a function of number of the monomer units (n) have an approximate n{sup 3} dependence, differing only in the scaling constant. The origin of such enhancement is discussed and compared to those in one-dimensional {pi}-conjugated systems.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Department of Defense, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 82398
• Report Number(s): ANL/CHM/CP--86825; CONF-950793--3; ON: DE95014233
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ABSORPTION SPECTRA
CHLOROPHYLL
DIMERS
ELECTRONIC STRUCTURE
PHOTOCHEMISTRY
PHTHALOCYANINES
POLARIZABILITY
PORPHYRINS
SILICON COMPOUNDS