chemistry of organic crystals fe-507 houjou lab. -5 · wavelength (nm) 400 500 600 700 0.0 0.2 0.4...

Institute of Industrial Science

HOUJOU LAB.

Fe-507

［Functional Organic Materials］

Department of Material and Environmental Science

http://www.iis.u-tokyo.ac.jp/~houjou/hjlab_wiki/

Molecular Integrated System Engineering

Functional Organic Crystals

Our research aims for creating new functional materials originating not only in molecular structure,

but also in molecular arrangement in organic crystal.

Functions arising from molecular arrangement

Chemistry of Organic Crystals

Department of

Chemistry and

Biotechnology

Polymorph and Spectral Change

p-Conjugated Metallopolymers

H. Houjou, et al., Inorg. Chem. (2011).; K. Yagi, et al., Macromol. Rapid Commun. (2012).

H. Houjou, et al., Org. Electronics (2013).; H. Houjou, et al., J. Inorg. Organomet. Polym. Mater. (2015).

S. Hara, et al., Cryst. Growth. Des. (2011).

S. Hara, et al., J. Phys. Chem. A (2014).

H. Houjou, et al., Chem. Eur. J. (2011).

S. Takeda, et al., Bull. Chem. Soc. Jpn. (2015).

Dichroic Emission

O

O

NN

N

Zn

N

N

O

O

O

Zn

O

N

N

O

N

NO

Zn

N

O

NO Zn

O

N

Zn

Zn

N

N

N

N

N N

O

O

O

O

330-380 nmEnergy Transfer

490 nm

600 nm

Γ-1

analyzer

polarizer

(a) (b) (c)

(d) (e) (f)

350 400 450 500 550

m=10 (prism)

m=10 (needle)

m=11

m=12

m=9 (after heat)

/nm

Abso

rban

ce (

a.u.)

m=9 (before heat)

5 10 15 20 25 30 35

89 °C (2-phase)

Inte

nsi

ty (

a.u.)

2 (°)

27 °C (3-phase)

143 °C (1-phase)

21 °C (-phase)

Spectral profile

HB network

II I

Alternate Bunting

liquid Phase

Bunting

I

cooling heating

- 7.26 eV

(au)

- 1.29 eV

(bg)

- 7.31 eV

(a2)

- 7.24 eV

(b2)

- 1.35 eV

(a2)

- 1.22 eV

(b2)

O

N N

O

N N

O

Co

Co

O

O

N N

O

N N

O

Co

Co

O

RO OR

RO OR

O

N N

O

Co

RO OR

0 10 20 30 40 5010

-7

10-5

10-3

10-1

101

103

Cu

rren

t d

ensi

ty (

A/c

m2)

Voltage (V)

A

Au Au

Glass or n-Si/SiO2

20.5 Å

～25 Å

0 10 20 30 400

500

1000

1500

2000

2500

3000

Inte

nsi

ty (

a.u.)

2 / deg.

400 500 600 700

Wavelength (nm)

400 500 600 7000.0

0.2

0.4

0.6

0.8

1.0

Ab

sorb

ance

Wavelength (nm)