Optical second harmonic generation of (dimethylamino)benzonitrile molecules incorporated in the molecular sieve AlPO4-5

Marlow, Frank; Caro, Jürgen; Werner, L. H.; Kornatowski, J.; Dähne, S.

doi:10.1021/j100145a029

Cited by 83 publications

(59 citation statements)

References 6 publications

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“…Recent experiments involving composites of organic molecules and molecular sieves suggest the possibility of producing nonlinear devices with a high thermal stability due to the mineral nature of the sieves [8]. Organic molecules trapped within sieves can become preferentially orientated by, for example, intermolecular hydrogen bonding; this is thought to be the case for p-nitroaniline (PNA) which forms very well aligned dipole chains within sieves.…”

Section: Second Harmonic Generation From a Normal Distribution Of Orimentioning

confidence: 99%

“…We shall adopt the beam configuration shown in Fig. 4, setting 00 = 0 from now on to coincide with the experimental arrangement used by these authors [8]. The second harmonic signal is measured in the forward direction and we take the plane polarised beams to be such that the fundamental makes an angle 4, to the orientation direction (the molecular sieve axis), the second harmonic making an angle 4'' with respect to the same axis.…”

Section: Second Harmonic Generation From a Normal Distribution Of Orimentioning

confidence: 99%

“…Eq. Marlow et al [8] have carried out experiments using a frequency doubled Nd:YAG laser and (dimethylamino)benzonitrile (DMABN) trapped in A1PO4-5 molecular sieves, empirically fitting their data to expressions of the form ill(4>) = a2cos4~b + besin 4& --( a z + b2)cosg~b -2 b2cos2th + b 2 ,…”

Section: Second Harmonic Generation From a Normal Distribution Of Orimentioning

confidence: 99%

“…In situations where such isotropy can be removed or is naturally lacking, SHG is allowed and can hence provide a very sensitive tool for detecting preferential molecular orientation. For example SHG has been used to gauge molecular orientation: at fluid interfaces [2,3]; within cell membranes [4,5]; of dipolar chromophores in poled polymers [6,7] and of molecules within molecular sieves [8]. In circumstances where preferential orientation arises, theory requires the application of suitably weighted three-dimensional rotational ensemble averages in order to arrive at the nett media response.…”

Section: Introductionmentioning

confidence: 99%

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Second harmonic generation in partially ordered media and at interfaces: analysis of dynamical and orientational factors

Andrews¹,

Hands²

1996

Chemical Physics

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A new method of modelling molecular orientational dynamics is presented and illustrated by application to optical second harmonic generation (SHG). The method highlights the intricate dependence of the harmonic signal on the form and evolution of the molecular orientational distribution, and reference is made to some examples taken from the recent literature. Specifically, the cases considered relate to SHG in (a) poled polymers, (b) molecules oriented within molecular sieves and (c) molecules in films or adsorbed on surfaces. The technique invokes rotational averages weighted by static or time-dependent distribution functions expressed in terms of Legendre polynomials. Rotational diffusion is used to model the decay of second harmonic intensity associated with a growth or recovery of bulk isotropy, the results allowing several discrete contributions associated with different time constants to be characterised. For polarisation studies using surfaces and films, it is shown that caution is required in how the results are interpreted to reflect molecular orientation, approximations in commonly employed theory readily producing spurious results.

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Section: Second Harmonic Generation From a Normal Distribution Of Orimentioning

confidence: 99%

Section: Second Harmonic Generation From a Normal Distribution Of Orimentioning

confidence: 99%

Section: Second Harmonic Generation From a Normal Distribution Of Orimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Second harmonic generation in partially ordered media and at interfaces: analysis of dynamical and orientational factors

Andrews¹,

Hands²

1996

Chemical Physics

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“…[21][22][23][24][25] However, even when very large zeolite crystals (3-4 µm in length) were used, the measurement and utilization of their optical properties were not easy. Light-emitting polymer molecules were incorporated into uniformly aligned channels of mesoporous silica to realize an artificial light-harvesting unit.…”

Section: Introductionmentioning

confidence: 99%

Determination of the Hyperpolarizability Components of Hemicyanine Dyes by Measuring the Anisotropic Fluorescence and Second Harmonic of the Dyes Uniformly Aligned within Zeolite Channels

et al. 2006

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A unidirectional ensemble of hemicyanine molecules was prepared by inserting the molecules into the vertical channels of a uniformly oriented zeolite (silicalite-1) film grown on a glass substrate. Fluorescence from this sample excited with light polarized along the vertical channel was 50 times larger than that excited with light polarized orthogonal to the vertical channel direction. These vertically aligned hemicyanine dyes were used to determine the ratio of the molecular hyperpolarizability components zxx / zzz of hemicyanine.

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Ordered porous materials as media for the organization of matter on the nanoscale

Ihlein

Junges

et al. 1998

Applied Organom Chemis

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Ordered porous inorganic compounds can now be synthesized with pore sizes between 0.3 nm and several tens of nanometers. The sharp pore size distribution of such materials and the ordered pore arrangement open possibilities for using them to organize matter on the nanometer scale. This overview highlights different aspects of this topic, using four selected examples: the spatial organization of molecules with high molecular hyperpolarizability to create a frequency‐doubling element; the encapsulation of a laser dye which results in a new class of solid‐state lasers; the encapsulation of small metal clusters in mesoporous ordered oxides; and the encapsulation of semiconductor clusters in such oxides. © 1998 John Wiley & Sons, Ltd.

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Optical second harmonic generation of (dimethylamino)benzonitrile molecules incorporated in the molecular sieve AlPO4-5

Cited by 83 publications

References 6 publications

Second harmonic generation in partially ordered media and at interfaces: analysis of dynamical and orientational factors

Second harmonic generation in partially ordered media and at interfaces: analysis of dynamical and orientational factors

Determination of the Hyperpolarizability Components of Hemicyanine Dyes by Measuring the Anisotropic Fluorescence and Second Harmonic of the Dyes Uniformly Aligned within Zeolite Channels

Ordered porous materials as media for the organization of matter on the nanoscale

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