inorganic chemistry

TABLE VI

P

HOTOPHYSICAL

P

ROPERTIES OF

[Re(bpy)(CO)

(dppe){Re(bpy)(CO) 3

(dppe)} 2

N

Re(bpy)(CO) 2

] 3

Nþ

C

OMPLEXES

a.

n

lem

(nm)

F

e

te

b

(ns)

ket

c

(10

7

s

1 )

Observed at 480 nm

Observed at 575 nm

t^1

t^2

t^3

t^1

t^2

t^3

2

523

0.072

865(100)

––

865(100)

–––

3

572

0.073

11(91)

• 
  

823(9)

––

833(100)

8.98

4

572

0.066

11(73)

128(7)

798(20)

• 
  

128(12)

798(88)

8.98

5

572

0.062

11(83)

112(1)

796(16)

• 
  

112(5)

796(95)

8.98

6

571

0.058

11(57)

129(5)

768(38)

• 
  

129(12)

768(88)

8.98

8

571

0.056

10(86)

110(2)

763(12)

• 
  

110(11)

763(89)

9.88

10

572

0.053

8(81)

168(12)

720(8)

• 
  

168(21)

720(79)

12.38

12

572

0.051

7(82)

118(4)

758(14)

• 
  

118(15)

758(85)

14.17

15

572

0.049

4(96)

162(4)

––

162(20)

764(80)

24.88

16

572

0.048

5(87)

64(3)

757(10)

• 
  

64(22)

757(78)

19.88

20

572

0.046

4(92)

132(8)

––

132(14)

747(86)

24.88

aMeasured in a deoxygenated acetonitrile solution at 298 K.bLifetime. Numbers in parentheses are percentages of preexponential factors of triexponential decay fitting results.cEnergy-transfer rates from the edge units to the interior ones (

ket

).