New trends in ion-selective electrodes - Electrochemical Sensors, Biosensors and Their Biomedical Applications - page 73

O O

C 18 H 37

OO R O O

(C 12 H 25 ) 3 N
H 1

O O

O O

O O

N

O O

O

H 2 (ETH 1778)

Li 1 : R C 14 H 29

Na 1

Li 2

NO 2

O

HN O

O

NH

O

O

O

O NH

O

C 12 H 25

O O

OC 2 H 5 O O

C 2 H 5 O

O

O O

O

O

O

OO O

K 2 (BME 44)

K 1
(valinomycin)

HN NH

O

O

Na 2

O O

O

NH

NO 2

O

O O

O

O O

O

O

O

H

H

O O

O

N N

NH

O O

(CH 2 ) 10 (H 2 C) 10

O N

Ca 2 2

(ETH 129)

O

Ca 2

O

1
(ETH 1001)

O

O O

NH NH

N N

O

O N O N

O O

O O

Mg 2 1
(ETH 5506)

O

Cl

N N

O

In

O O

C 12 H 25 O O C 12 H 25

O

N N

NH 4

O 1 (nonactin) O

O

O O

O

Cl 1

N N

O

O 2

O O

O O

HPO 2 1

O

N(C 8 H 17 ) 2

O O

S NH HN S

O

Cl 2

NH HN

O O

CO 2 1

O CF 3

S NH HN S

O CF 3

NH HN Hg Hg

SO 2 1

Hg
I 1
-BH
-C

FIGURE 4.1 Structures of common ionophores used in ion-selective membranes.