Readline bindings not working with Control and Shift modifiers

I’m tweaking with GNU Readline’s key bindings in Bash. Specifically, I wish to achieve the following mapping effect:

Control' ==> 'I'

ControlShift' ==> "I"

Control` ==> `I`

Control[ ==> [I]

ControlShift[ ==> {I}

where I indicates the cursor position after expansion.

I have tried the following configuration in my ~/.inputrc. However, only the <C-`> mapping works as expected:

$include /etc/inputrc
$if mode=emacs
"C-'": "''C-b"
"C-`": "``C-b"
"C-"": """C-b"
"C-{": "{}C-b"
"C-[": "[]C-b"
$endif

I’m wondering what is wrong with my configuration and how to make these mappings correctly (if possible)?