  In this study, the spectroscopic parameters of the exotic molecular states
composed of mesons containing two heavy quarks (scalar-axial and
pseudoscalar-axial meson combinations) are investigated within QCD sum rules.
Our findings reveal that the molecular states containing charm quarks do not
form bound states, whereas the states with b-quarks can form the exotic
molecular states. This observation has significant implications for
understanding the structure of these exotic states.
