2. Charge transfer model in SCIHB
Suppose one end
of a SCIHB, consisting only from resonant groups, is linked by hydrogen bond to
charge donor (HD1 -) with an elevated electrochemical potential and on
the other end of a system is linked to an acceptor (HA1) whose potential is low.
At the first stage (initial state
1) donor D1 yields its charge
into SCIHB and attracts a proton:
|
а) initial state 1 |
HD1-
---> HQ1–R=X1...HQ2–R=X2... ...HQn–R=Xn...HA1 + H+ |
After the
displacement of a proton from Q1 to D1 the group –Q1–R=X1 passes to the
state Q1=R–X1– and induces translocation of proton from Q2 to X1. The charge moves from D1 to A1, which is accompanies by the cooperative shift of protons
and migration of double bond in the opposite direction, release of proton by D1 into the medium
and uptake of aproton from the medium by A1. Electroneutrality is thus
preserved (terminal state 1):
|
б) terminal state 1 |
H+ + D1 H...Q1=R–X1H...Q2=R–X2H... ...Qn=R–XnH ---> A1H |
After D1 molecule is replaced by A2 and A1 by D2 a similar process
of charge transfer can proceed in the opposite
direction (initial state 2).
|
c)
initial state 2 |
H+ + A2H...Q1=R–X1H...Q2=R–X2H...
Qn=R–XnH <--- –D2H |
|
d)
terminal state 2 |
HA2
<--- HQ1–R=X1...HQ2–R=X2... ...HQn–R=Xn...HD2 + H+ |
The process ends
by transition to the terminal state 2.
After another
interchange of donors and acceptors the cycle is repeated. Conditions of realization
of the given model in biostructures are formulated and visually presented below.
|
Conditions
of realization of the given model in biostructures (Fig.1) |
Condition |
The comment |
|
1.
Asymmetry of an arrangement of protons in SCIHB |
In figure 1atoms of hydrogen are located in
SCIHB asymmetrically |
|
|
2.
Presence of the isolating environment for functioning SCIHB |
These systems are shipped in structure
isolating from an environment |
|
|
3.
Possibility of effective change of donors and acceptors of charges |
Inputs and outputs of SCIHB
are accessible to replaced donors and acceptors. |
|
|
4.
Thermodynamic
reversibility of charge transfer on
SCIHB |
Iit is provided with symmetry of duplicated structures and symmetry of
initial and terminal conditions |
|
|
Consequence of the given mechanism is alternative of work of the
substructures containing SCIHB |
||
|
|
|
Fig.1.
Conditions of realisation of model of
charges transfer in supramolecular biostructures. а, в – initial states, б, г – terminal states. |
From all conditions we will stop only on the first and
the fourth which can form a basis for an explanation of the nature and a life
origin.
Transition to Section 3: About essence of a life