Supramolecular networks with electron transfer in two dimensions

Patent metadata

Field	Value
Publication number	US-9443636-B2
Application number	US-201213526215-A
Country	US
Kind code	B2
Filing date	Jun 18, 2012
Priority date	Jun 17, 2011
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

Organic charge-transfer (CT) co-crystals in a crossed stack system are disclosed. The co-crystals exhibit bidirectional charge transfer interactions where one donor molecule shares electrons with two different acceptors, one acceptor face-to-face and the other edge-to-face. The assembly and charge transfer interaction results in a pleochroic material whereby the optical absorption continuously changes depending on the polarization angle of incident light.

First claim

What is claimed is:

1. An organic charge-transfer (CT) co-crystal in a crossed stack lattice exhibiting bidirectional CT interactions, where one donor molecule shares electrons with two different acceptors; wherein one acceptor is face-to-face with the donor and a second acceptor is edge-to-face with the donor, and wherein the co-crystal exhibits visible pleochroism with RGB and CMYK colors, said organic CT co-crystal selected from the group consisting of

and

2. The organic CT co-crystal according to claim 1 , wherein the acceptor is a diimide.

3. The organic CT co-crystal according to claim 1 , wherein the ionicity of

and

are ρ ms =0.53, ρ xs =0.47, and ρ ms =0.57, ρ xs , =0.42, respectively.

4. The organic CT co-crystal according to claim 1 , wherein the co-crystal violates the mutual exclusion rule of IR and Raman modes along a mixed stack axes and a crossed stack axes.

5. The organic CT co-crystal according to claim 1 , wherein absorption of light of the co-crystal is anisotropic.

6. The organic CT co-crystal according to claim 5 , wherein two distinct chromophores are observed.

7. The organic CT co-crystal according to claim 6 , wherein the two distinct chromophores absorb light at 53° and 95° with absorption maxima at 475 nm and 527 nm, respectively.

8. The organic CT co-crystal according to claim 6 , wherein the two distinct chromophores absorb light at 89° and 117° with absorption maxima at 490 nm and 595 nm, respectively.

Assignees

• Stupp Samuel I
• Stoddart J Fraser
• Shveyd Alexander K
• Tayi Alok S
• Sue Chi-Hau
• Narayanan Ashwin
• Univ Northwestern

Inventors

• Stupp Samuel I
• Stoddart J Fraser
• Shveyd Alexander K
• Tayi Alok S
• Sue Chi-Hau
• Narayanan Ashwin

Classifications

• G02B1/02

  made of crystals, e.g. rock-salt, semi-conductors (G02B1/08 takes precedence) · CPC title

• H01B1/121 Primary

  Charge-transfer complexes · CPC title